diff --git a/src/File_MARC_Reference.php b/src/File_MARC_Reference.php
index 625fe2d..6a2eb18 100755
--- a/src/File_MARC_Reference.php
+++ b/src/File_MARC_Reference.php
@@ -109,6 +109,7 @@ private function interpreteSpec()
                 if ($this->field instanceof File_MARC_Data_Field) {
                     foreach ($this->spec['subfields'] as $currentSubfieldSpec) {
                         if ($_subfields = $this->referenceSubfields($currentSubfieldSpec)) {
+                            $currentSubfieldSpec = clone $currentSubfieldSpec;
                             foreach ($_subfields as $subfieldIndex => $subfield) {
                                 $currentSubfieldSpec->setIndexStartEnd($subfieldIndex, $subfieldIndex);
                                 /*
diff --git a/test/ReferenceTest.php b/test/ReferenceTest.php
index b6befd7..73a919c 100755
--- a/test/ReferenceTest.php
+++ b/test/ReferenceTest.php
@@ -16,6 +16,7 @@
 class File_MARC_ReferenceTest extends TestCase
 {
     protected $record;
+    protected $record2;
 
     protected function setUp()
     {
@@ -26,6 +27,14 @@ protected function setUp()
             // Iterate through the retrieved records
             $this->record = $records->next();
         }
+
+        if (false === ($this->record2 instanceof \File_MARC_Record)) {
+            // Retrieve a set of MARC records from a file
+            $records = new \File_MARC('test/example2.mrc');
+
+            // Iterate through the retrieved records
+            $this->record2 = $records->next();
+        }
     }
 
     public function testInstanciateFile_MARC_Record()
@@ -150,6 +159,20 @@ public function testGetSubfieldsOfRepeatedField()
         $this->assertSame($_contents, $Reference->content);
     }
 
+    public function testGetRepeatedSubfieldsOfRepeatedField()
+    {
+        $_contents = [
+            '(DE-588)4067488-5',
+            '(DE-627)10454466X',
+            '(DE-576)20917000X',
+            '(DE-588)4143389-0',
+            '(DE-627)105605913',
+            '(DE-576)209725893'
+        ];
+        $Reference = new File_MARC_Reference('655$0', $this->record2);
+        $this->assertSame($_contents, $Reference->content);
+    }
+
     public function testGetSubfieldByIndex()
     {
         $newSubfield = new \File_MARC_Subfield('a', 'a test');
diff --git a/test/example2.mrc b/test/example2.mrc
new file mode 100644
index 0000000..bb3cb8f
--- /dev/null
+++ b/test/example2.mrc
@@ -0,0 +1 @@
+01671cas a2200433   4500001001000000003000700010005001700017007000300034008004100037016002200078016001900100022001400119030001000133035002200143035002200165035002200187035002100209035002100230040003100251044001000282082001600292084003800308210001700346245005100363264004400414336002600458337004600484338002500530362004300555363001200598363001200610591012900622655008600751655009100837689007600928689001101004936021501015951000701230129090085DE-62720201120103247.0tu931114d19701976xxkz| p|      0   |0und c7 a0100839442DE-1017 a6241-82DE-600  a0071-1438  aESPHA  a(DE-627)129090085  a(DE-576)014425092  a(DE-599)ZDB6241-8  a(OCoLC)263589873  a(OCoLC)263589873  aDE-627bgercDE-627erakwb  cXA-GB04a530qDE-600  aUD 75662rvk0(DE-625)rvk/145540:10aEssays Phys.10aEssays in physicsced. by G. K. T. Conn [u.a.]31aLondon [u.a.]bAcadem. Pressc1970-1976  aTextbtxt2rdacontent  aohne Hilfsmittel zu benutzenbn2rdamedia  aBandbnc2rdacarrier0 a1.1970 - 6.1976; damit Ersch. eingest.00a1i197010a6i1976  aSortierzählung bei Bänden maschinell geändert (GBV). - C!188!zs-Änderung(15-05-03) (SWB). - C!188!zs-Änderung(15-05-03) 7aZeitschrift0(DE-588)4067488-50(DE-627)10454466X0(DE-576)20917000X2gnd-content 7aAufgabensammlung0(DE-588)4143389-00(DE-627)1056059130(DE-576)2097258932gnd-content00Ds0(DE-588)4045956-10(DE-627)1061999000(DE-576)209067276aPhysik2gnd0 5DE-101rvaUD 7566bEssays in PhysicskPhysikkKongresse, Sommerschulen, geschlossen aufgestellte SerienkGeschlossen aufgestellte ReihenwerkekEssays in Physics0(DE-627)12718207650(DE-625)rvk/145540:0(DE-576)201820765  aJT
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