- push @bind_strs, " biblioitems.publicationyear = ? ";
- push @bind_args, $args{publicationyear};
+ push @bind_strs, " ((biblioitems.publicationyear LIKE CONCAT('%', ?, '%')) OR (biblio.copyrightdate LIKE CONCAT('%', ?, '%'))) ";
+ push @bind_args, $args{publicationyear}, $args{publicationyear};