From 6f76a72abf717b3e1fa3ea4027169734b1ebbad7 Mon Sep 17 00:00:00 2001
From: Don Armstrong <don@donarmstrong.com>
Date: Fri, 2 Dec 2016 08:59:21 -0800
Subject: [PATCH] handle single ISSN

---
 lib/Reference/Retrieve/PubMed.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Reference/Retrieve/PubMed.pm b/lib/Reference/Retrieve/PubMed.pm
index 0ecc842..d1de4e9 100644
--- a/lib/Reference/Retrieve/PubMed.pm
+++ b/lib/Reference/Retrieve/PubMed.pm
@@ -362,6 +362,9 @@ sub _fix_medline_journal($$$;){
 	       $journal{lc($2)} = $3;
 	  }
   }
+     if (ref $ref->{JrXml}{Serial}{ISSN} ne 'ARRAY') {
+         $ref->{JrXml}{Serial}{ISSN} = [$ref->{JrXml}{Serial}{ISSN}];
+     }
      my $print_issn = $ref->{JrXml}{Serial}{ISSN}[0]{IssnType} eq 'Print' ? 0 : 1;
      my @journal_entry =
          (title       => $ref->{JrXml}{Serial}{Title},
-- 
2.39.2