|d instead of |c

from marcbib.module:

function marcbib_addl_author($marc){
  $fields = marcbib_author_fields();
  $authors = array();
  foreach($fields as $field){
    if (marc_value($marc, $field.'|a')){
      $authors[$field] = marc_clean_field(marc_value($marc, $field.'|a')).', '.marc_clean_field(marc_value($marc, $field.'|c'));
    }
  }
  return $authors;
}

should be

      $authors[$field] = marc_clean_field(marc_value($marc, $field.'|a')).', '.marc_clean_field(marc_value($marc, $field.'|d'));

as |d is year