diff --git a/modules/RIS/biblio_ris.install b/modules/RIS/biblio_ris.install
index 7e30da9..4d02d37 100644
--- a/modules/RIS/biblio_ris.install
+++ b/modules/RIS/biblio_ris.install
@@ -18,6 +18,11 @@ function biblio_ris_uninstall() {
   update_sql("DELETE FROM {biblio_type_maps} WHERE format = 'ris'");
 }
 
+function biblio_ris_update_6001() {
+  update_sql("DELETE FROM {biblio_type_maps} WHERE format = 'ris'");
+  _save_ris_maps();
+}
+
 function biblio_ris_requirements($phase) {
   $requirements = array();
   $t = get_t();
@@ -177,9 +182,9 @@ function _get_ris_field_map() {
                 'RP'  =>  '',                     //- Reprint status (IN FILE, NOT IN FILE, ON REQUEST (MM/DD/YY))
                 'SP'  =>  '',                     //- Start page number
                 'EP'  =>  '',                     //- Ending page number
-                'JF'  => 'biblio_secondary_title',//- Periodical full name
-                'JO'  => 'biblio_short_title',    //- Periodical standard abbreviation
-                'JA'  => 'biblio_secondary_title',//- Periodical in which article was published
+                'JF'  => 'biblio_secondary_title',//- Periodical name: full format. This is an alphanumeric field of up to 255 characters
+                'JO'  => 'biblio_secondary_title',//- Periodical name: full format. This is an alphanumeric field of up to 255 characters
+                'JA'  => 'biblio_short_title',    //- Periodical name: standard abbreviation. This is an alphanumeric field of up to 255 characters.
                 'J1'  => 'biblio_short_title',    //- Periodical name //- User abbreviation 1
                 'J2'  => 'biblio_short_title',    //- Periodical name - User abbreviation 2
                 'VL'  => 'biblio_volume',         //- Volume number
diff --git a/modules/RIS/biblio_ris.module b/modules/RIS/biblio_ris.module
index 07ce93a..53b6ddf 100644
--- a/modules/RIS/biblio_ris.module
+++ b/modules/RIS/biblio_ris.module
@@ -318,6 +318,14 @@ function _biblio_ris_parse_line($tag, $data, $node) {
         $node->biblio_secondary_title = $data;
       }
       break;
+    case 'JF': //these fields are to be mapped on a shared field (n:1), hence do not concatenate string, take first value only
+    case 'JO': 
+    case 'JA':
+    case 'J1':
+    case 'J2':
+      $field = _biblio_ris_field_map($tag);
+      if ($field && empty($node->$field)) $node->$field = $data;
+      break;
     default :
       $field = _biblio_ris_field_map($tag);
       if ($field) $node->$field .= $data;