diff --git a/README.rst b/README.rst
index f424f6f..cc6b6e1 100644
--- a/README.rst
+++ b/README.rst
@@ -273,11 +273,13 @@ Notes:
   The relationship type is ``skos:broader`` if ``$w=g``, ``skos:narrower`` if ``$w=h``,
   and ``skos:related`` otherwise.
   If ``$w=r`` and ``$4`` contains an URI, that URI is used as the relationship type.
-
-*  Mappings/relationships are generated for 7XX headings if the fields contain a ``$0``
-   subfield containing either the control number or the URI of the related record.
-   If ``$0`` contains a control number, an URI pattern for the vocabulary
-   (found in indicator 2 or ``$2``) must be defined in mc2skos.record.CONFIG.
-   If ``$4`` contains an URI, that URI is used as the relationship type.
-   Otherwise, if ``$4`` contains one of the ISO 25964 relations, the corresponding
-   SKOS relation is used. Otherwise, the default value ``skos:closeMatch`` is used.
+  Note that ``$4`` must precede ``$0`` (since both subfields can be repeated).
+
+* Mappings/relationships are generated for 7XX headings if the fields contain a ``$0``
+  subfield containing either the control number or the URI of the related record.
+  If ``$0`` contains a control number, an URI pattern for the vocabulary
+  (found in indicator 2 or ``$2``) must be defined in mc2skos.record.CONFIG.
+  If ``$4`` contains an URI, that URI is used as the relationship type.
+  Otherwise, if ``$4`` contains one of the ISO 25964 relations, the corresponding
+  SKOS relation is used. Otherwise, the default value ``skos:closeMatch`` is used.
+  Note that ``$4`` must precede ``$0`` (since both subfields can be repeated).
diff --git a/examples/noubomn-c000011.ttl b/examples/noubomn-c000011.ttl
index c21269d..cebbe29 100644
--- a/examples/noubomn-c000011.ttl
+++ b/examples/noubomn-c000011.ttl
@@ -13,6 +13,7 @@
     owl:deprecated true ;
     skos:closeMatch <http://id.loc.gov/authorities/subjects/sh85086566> ;
     skos:exactMatch <http://data.ub.uio.no/humord/c08221>,
+        <http://dbpedia.org/page/Mold>,
         <http://www.wikidata.org/entity/Q159341> ;
     skos:inScheme <http://data.ub.uio.no/realfagstermer/> ;
     skos:prefLabel "Mugg"@nb .
diff --git a/examples/noubomn-c000011.xml b/examples/noubomn-c000011.xml
index 1a1d3eb..7fa7987 100644
--- a/examples/noubomn-c000011.xml
+++ b/examples/noubomn-c000011.xml
@@ -19,14 +19,14 @@
   </datafield>
   <datafield ind1=" " ind2="7" tag="750">
     <subfield code="a">Muggsopp</subfield>
+    <subfield code="4">=EQ</subfield>
     <subfield code="0">(No-TrBIB)HUME08221</subfield>
     <subfield code="2">humord</subfield>
-    <subfield code="4">=EQ</subfield>
   </datafield>
   <datafield ind1=" " ind2="7" tag="750">
-    <subfield code="a">muggsopp</subfield>
-    <subfield code="0">http://www.wikidata.org/entity/Q159341</subfield>
     <subfield code="4">http://www.w3.org/2004/02/skos/core#exactMatch</subfield>
+    <subfield code="0">http://www.wikidata.org/entity/Q159341</subfield>
+    <subfield code="0">http://dbpedia.org/page/Mold</subfield>
   </datafield>
   <datafield ind1=" " ind2="0" tag="750">
     <subfield code="a">Molds (Fungi)</subfield>
diff --git a/mc2skos/record.py b/mc2skos/record.py
index 0eee494..86d2bab 100644
--- a/mc2skos/record.py
+++ b/mc2skos/record.py
@@ -758,40 +758,43 @@ def parse(self, options):
 
         # 7XX: Heading Linking Entries
         for heading in self.get_terms('7'):
-            sf_4 = heading['node'].text('mx:subfield[@code="4"]')
-            sf_0 = heading['node'].text('mx:subfield[@code="0"]')
+            relation = None
+            for sf in heading['node'].all('mx:subfield'):
+                if sf.get('code') == '4':
+                    if is_uri(sf.text()):
+                        relation = URIRef(sf.text())
+                    else:
+                        relation = {
+                            '=EQ': SKOS.exactMatch,
+                            '~EQ': SKOS.closeMatch,
+                            'BM': SKOS.broadMatch,
+                            'NM': SKOS.narrowMatch,
+                            'RM': SKOS.relatedMatch,
+                        }.get(sf.text())  # None if no match
+
+                elif sf.get('code') == '0':
+                    # Note: Default value might change in the future
+                    relation = relation if relation else SKOS.closeMatch
+
+                    if is_uri(sf.text()):
+                        self.relations.append({
+                            'uri': sf.text(),
+                            'relation': relation,
+                        })
+                    else:
+                        scheme_code = {
+                            '0': 'a',  # Library of Congress Subject Headings
+                            '1': 'b',  # LC subject headings for children's literature
+                            '2': 'c',  # Medical Subject Headings
+                            '3': 'd',  # National Agricultural Library subject authority file
+                            '4': 'n',  # Source not specified
+                            '5': 'k',  # Canadian Subject Headings
+                            '6': 'v',  # Répertoire de vedettes-matière
+                            '7': heading['node'].text('mx:subfield[@code="2"]'),  # Source specified in subfield $2
+                        }.get(heading['node'].get('ind2'))
 
-            if sf_4 is not None and is_uri(sf_4):
-                relation = URIRef(sf_4)
-            else:
-                relation = {
-                    '=EQ': SKOS.exactMatch,
-                    '~EQ': SKOS.closeMatch,
-                    'BM': SKOS.broadMatch,
-                    'NM': SKOS.narrowMatch,
-                    'RM': SKOS.relatedMatch,
-                }.get(sf_4)
-
-            relation = relation or SKOS.closeMatch  # default
-            if is_uri(sf_0):
-                self.relations.append({
-                    'uri': sf_0,
-                    'relation': relation,
-                })
-            else:
-                scheme_code = {
-                    '0': 'a',  # Library of Congress Subject Headings
-                    '1': 'b',  # LC subject headings for children's literature
-                    '2': 'c',  # Medical Subject Headings
-                    '3': 'd',  # National Agricultural Library subject authority file
-                    '4': 'n',  # Source not specified
-                    '5': 'k',  # Canadian Subject Headings
-                    '6': 'v',  # Répertoire de vedettes-matière
-                    '7': heading['node'].text('mx:subfield[@code="2"]'),  # Source specified in subfield $2
-                }.get(heading['node'].get('ind2'))
-
-                self.append_relation(
-                    ConceptScheme(scheme_code, AuthorityRecord),
-                    relation,
-                    control_number=sf_0
-                )
+                        self.append_relation(
+                            ConceptScheme(scheme_code, AuthorityRecord),
+                            relation,
+                            control_number=sf.text()
+                        )