diff --git a/cosmogramme/VERSIONS_WIP/92566 b/cosmogramme/VERSIONS_WIP/92566
new file mode 100644
index 0000000000000000000000000000000000000000..a9cac28650b65b714477dd15585f4dd6a1a83574
--- /dev/null
+++ b/cosmogramme/VERSIONS_WIP/92566
@@ -0,0 +1 @@
+ - ticket #92566 : Cosmogramme : dédoublonnage des périodiques par ISSN
\ No newline at end of file
diff --git a/cosmogramme/php/classes/classe_notice_integration.php b/cosmogramme/php/classes/classe_notice_integration.php
index 90e25cc429caae4f5fcbfe3a5e49a67efc35ce7d..008a83dabf840171ac477d1306fda1013ddd58f5 100644
--- a/cosmogramme/php/classes/classe_notice_integration.php
+++ b/cosmogramme/php/classes/classe_notice_integration.php
@@ -566,6 +566,7 @@ class notice_integration {
             'facettes' => $this->notice['facettes'],
             'isbn' => $this->notice['isbn'],
             'ean' => $this->notice['ean'],
+            'issn' => $this->notice['issn'],
             'id_commerciale' => $this->notice['id_commerciale'],
             'clef_alpha' => $this->notice['clef_alpha'],
             'clef_chapeau' => $this->notice['clef_chapeau'],
diff --git a/cosmogramme/php/classes/classe_unimarc.php b/cosmogramme/php/classes/classe_unimarc.php
index 45c8a9cc9db750d994fbe95d5e2d890b119e43cd..4d8e025357ccbb9e331490af43179d8d709a2bfd 100644
--- a/cosmogramme/php/classes/classe_unimarc.php
+++ b/cosmogramme/php/classes/classe_unimarc.php
@@ -149,6 +149,8 @@ class notice_unimarc extends iso2709_record {
       $trav['isbn10'] = $trav['isbn13'] = $trav['isbn'] = '';
     }
 
+    $trav['issn'] = $this->getIssn();
+
     return $trav;
   }
 
@@ -176,6 +178,7 @@ class notice_unimarc extends iso2709_record {
     $notice["isbn10"] = $record_identifiers['isbn10'];
     $notice["isbn13"] = $record_identifiers['isbn13'];
     $notice["ean"] = $record_identifiers['ean'];
+    $notice["issn"] = $record_identifiers['issn'];
     $notice["id_origine"] = $this->getIdOrigine();
     $notice["tome_alpha"] = $this->indexation->alphaMaj($this->getTome());
     $notice["clef_alpha"] = $this->indexation->getClefAlpha(
@@ -1008,8 +1011,9 @@ class notice_unimarc extends iso2709_record {
 
 
   public function getIssn()  {
-    $issn = $this->get_subfield("011", "a");
-    return trim($issn[0]);
+    return ($issn = $this->get_subfield("011", "a"))
+      ? trim($issn[0])
+      : '';
   }
 
 
diff --git a/cosmogramme/sql/patch/patch_392.php b/cosmogramme/sql/patch/patch_392.php
new file mode 100644
index 0000000000000000000000000000000000000000..4cd653ed753762d2e41e6e47ff25df22e0c01743
--- /dev/null
+++ b/cosmogramme/sql/patch/patch_392.php
@@ -0,0 +1,11 @@
+<?php
+
+$adapter = Zend_Db_Table_Abstract::getDefaultAdapter();
+
+try {
+  $adapter->query(
+                  'ALTER TABLE `notices` '
+                  . 'ADD COLUMN `issn` varchar(255)  default "",'
+                  . 'ADD KEY `issn` (`issn`)'
+  );
+} catch(Exception $e) {}
diff --git a/cosmogramme/tests/php/classes/KohaPeriodiquesTest.php b/cosmogramme/tests/php/classes/KohaPeriodiquesTest.php
index 0286ff14bcf5e7ce0c3019d8fd7a134712e31827..aa9e530cf645174aef5287228255c20b5f92f3de 100644
--- a/cosmogramme/tests/php/classes/KohaPeriodiquesTest.php
+++ b/cosmogramme/tests/php/classes/KohaPeriodiquesTest.php
@@ -423,6 +423,13 @@ class KohaPeriodiquesLaPagailleAndOkapiTest extends KohaPeriodiquesTestCase {
   }
 
 
+  /** @test */
+  public function perTitleRecordShouldHaveISSN0751_6002() {
+    $this->assertEquals('0751-6002',
+                        Class_Notice::findFirstBy(['type_doc' => 'per_title'])->getIssn());
+  }
+
+
     /** @test */
   public function perTitleRecordItemTypeShouldBeBibliographic() {
     $this->assertEquals(Class_Notice::TYPE_BIBLIOGRAPHIC,
diff --git a/library/Class/Notice/DoubleFinder.php b/library/Class/Notice/DoubleFinder.php
index b45706cc6bc842bb9fa4daeec1595a03afabf97d..352bdb17b7bc643db0b9549b5994c908e3e1d300 100644
--- a/library/Class/Notice/DoubleFinder.php
+++ b/library/Class/Notice/DoubleFinder.php
@@ -107,6 +107,7 @@ class Class_Notice_DoubleFinder {
 abstract class Class_Notice_DoubleFinder_Strategy {
   const
     FOUND_ON_BARCODE = 'code_barres',
+    FOUND_ON_ISSN = 'issn',
     FOUND_ON_ID_ORIGINE = 'id_origine';
 
   protected
@@ -361,6 +362,15 @@ class Class_Notice_DoubleFinder_PeriodicTitle extends Class_Notice_DoubleFinder_
   public function find($data) {
     $this->_data = $data;
 
+    if (trim($data->getissn()) &&
+        ($record = Class_Notice::findFirstBy(['type' => Class_Notice::TYPE_BIBLIOGRAPHIC,
+                                              'type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                                              'issn' => trim($data->getissn())]))) {
+      $this->_id = $record->getId();
+      $this->_found_on = static::FOUND_ON_ISSN;
+      return true;
+    }
+
     if (!$this->_id = $this->_getRecordIdByItem(['id_origine' => $data->getid_origine()]))
       return false;
 
diff --git a/tests/db/UpgradeDBTest.php b/tests/db/UpgradeDBTest.php
index 35e09dca96e359c9433c3df87df6a8ae497106d0..d848b6dbd16164dedf9c7f59d4b58a2a6e4b5f21 100644
--- a/tests/db/UpgradeDBTest.php
+++ b/tests/db/UpgradeDBTest.php
@@ -3360,3 +3360,18 @@ class UpgradeDB_391_Test extends UpgradeDBTestCase {
     $this->assertIndex('bib_admin_users', 'disable_newsletter');
   }
 }
+
+
+
+
+class UpgradeDB_392_Test extends UpgradeDBTestCase {
+  public function prepare() {
+    $this->silentQuery('ALTER TABLE notices drop column issn;');
+  }
+
+  /** @test */
+  public function noticesTableShouldHaveColumnIssnIndex() {
+    $this->assertFieldType('notices', 'issn', 'varchar(255)');
+    $this->assertIndex('notices', 'issn');
+  }
+}
diff --git a/tests/library/Class/Notice/DoubleFinderTest.php b/tests/library/Class/Notice/DoubleFinderTest.php
index 5d727556eb5e3dc6a14d469410e497d5dc9090c4..67fb07fdcd2fbaf6e54e43d505c05c396f904a72 100644
--- a/tests/library/Class/Notice/DoubleFinderTest.php
+++ b/tests/library/Class/Notice/DoubleFinderTest.php
@@ -42,6 +42,7 @@ abstract class DoubleFinderTestCase extends ModelTestCase {
                    ['id' => 1,
                     'type_doc' => Class_TypeDoc::LIVRE,
                     'isbn' => '2-85868-161-9',
+                    'issn' => '',
                     'clef_alpha' => 'JESUISNEBONHOMME--SARA--EDTHIERRYMAGNIER-2010-1',
                     'exemplaires' => [ $this->fixture('Class_Exemplaire',
                                                       ['id' => 1,
@@ -53,6 +54,7 @@ abstract class DoubleFinderTestCase extends ModelTestCase {
                    ['id' => 2,
                     'type_doc' => Class_TypeDoc::DILICOM,
                     'isbn' => '2-85868-161-9',
+                    'issn' => '',
                     'clef_alpha' => 'JESUISNEBONHOMME--SARA--EDTHIERRYMAGNIER-2010-1',
                     'exemplaires' => [ $this->fixture('Class_Exemplaire',
                                                       ['id' => 2,
@@ -64,12 +66,39 @@ abstract class DoubleFinderTestCase extends ModelTestCase {
                    ['id' => 3,
                     'type_doc' => Class_TypeDoc::RSS,
                     'isbn' => '2-85868-161-9',
+                    'issn' => '',
                     'clef_alpha' => 'JESUISNEBONHOMME--SARA--EDTHIERRYMAGNIER-2010-1',
                     'exemplaires' => [ $this->fixture('Class_Exemplaire',
                                                       ['id' => 3,
                                                        'code_barres' => '159',
                                                        'id_origine' => '789',
                                                        'id_int_bib' => 1])]]);
+
+
+    $this->fixture('Class_Notice',
+                   ['id' => 4,
+                    'type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                    'isbn' => '',
+                    'issn' => '0751-6002',
+                    'clef_alpha' => 'OKAPI--FRAPPATB-963-BAYARDPRESSE-2009-2',
+                    'exemplaires' => [ $this->fixture('Class_Exemplaire',
+                                                      ['id' => 4,
+                                                       'code_barres' => '93484673',
+                                                       'id_origine' => '823',
+                                                       'id_int_bib' => 1])]]);
+
+
+    $this->fixture('Class_Notice',
+                   ['id' => 5,
+                    'type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                    'isbn' => '',
+                    'issn' => '',
+                    'clef_alpha' => 'TAGADA',
+                    'exemplaires' => [ $this->fixture('Class_Exemplaire',
+                                                      ['id' => 5,
+                                                       'code_barres' => '67304',
+                                                       'id_origine' => '824',
+                                                       'id_int_bib' => 1])]]);
   }
 
 
@@ -183,6 +212,57 @@ class DoubleFinderWithExistingIsbnTest extends DoubleFinderWithRecordMatchingTes
 
 
 
+
+class DoubleFinderWithExistingISSNTest extends DoubleFinderTestCase {
+  protected $_data = ['type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                      'issn' => '0751-6002'];
+
+  /** @test */
+  public function shouldHaveMatchedISSN() {
+    $this->assertEquals('issn', $this->_finder->getMatchedCriteria());
+  }
+
+  /** @test */
+  public function shouldFindRecord() {
+    $this->assertFound();
+  }
+
+
+  /** @test */
+  public function recordIdShouldBeFour() {
+    $this->assertEquals(4, $this->_finder->getId());
+  }
+}
+
+
+
+
+class DoubleFinderWithNoISSNTest extends DoubleFinderTestCase {
+  protected $_data = ['type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                      'issn' => ''];
+
+  /** @test */
+  public function shouldNotFindRecord() {
+    $this->assertNotFound();
+  }
+}
+
+
+
+
+class DoubleFinderWithoutExistingISSNTest extends DoubleFinderTestCase {
+  protected $_data = ['type_doc' => Class_TypeDoc::PERIODIQUE_TITLE,
+                      'issn' => '6666-6666'];
+
+  /** @test */
+  public function shouldNotFindRecord() {
+    $this->assertNotFound();
+  }
+}
+
+
+
+
 class DoubleFinderWithExistingAlphaKeyTest extends DoubleFinderWithRecordMatchingTestCase {
   protected $_data = ['type_doc' => Class_TypeDoc::LIVRE,
                       'clef_alpha' => 'JESUISNEBONHOMME--SARA--EDTHIERRYMAGNIER-2010-1'];