+my $res = GetISBDView($biblionumber, "intranet");
+if ( not defined $res ) {
+ # biblionumber invalid -> report and exit
+ $template->param( unknownbiblionumber => 1,
+ biblionumber => $biblionumber
+ );
+ output_html_with_http_headers $query, $cookie, $template->output;
+ exit;
+}
+