+ $host_field = MARC::Field->new( 773, '0', ' ', %sfd );
+ return $host_field;
+ }
+ elsif ( $marcflavour eq 'UNIMARC' ) {
+ #author
+ if ( $field = $host->field('700') || $host->field('710') || $host->field('720') ) {
+ my $s = $field->as_string('ab');
+ if ($s) {
+ $sfd{a} = $s;
+ }
+ }
+ #title
+ if ( $field = $host->field('200') ) {
+ my $s = $field->as_string('a');
+ if ($s) {
+ $sfd{t} = $s;
+ }
+ }
+ #place of publicaton
+ if ( $field = $host->field('210') ) {
+ my $s = $field->as_string('a');
+ if ($s) {
+ $sfd{c} = $s;
+ }
+ }
+ #date of publication
+ if ( $field = $host->field('210') ) {
+ my $s = $field->as_string('d');
+ if ($s) {
+ $sfd{d} = $s;
+ }
+ }
+ #edition statement
+ if ( $field = $host->field('205') ) {
+ my $s = $field->as_string();
+ if ($s) {
+ $sfd{a} = $s;
+ }
+ }
+ #URL
+ if ( $field = $host->field('856') ) {
+ my $s = $field->as_string('u');
+ if ($s) {
+ $sfd{u} = $s;
+ }
+ }
+ #ISSN
+ if ( $field = $host->field('011') ) {
+ my $s = $field->as_string('a');
+ if ($s) {
+ $sfd{x} = $s;
+ }
+ }
+ #ISBN
+ if ( $field = $host->field('010') ) {
+ my $s = $field->as_string('a');
+ if ($s) {
+ $sfd{y} = $s;
+ }
+ }
+ if ( $field = $host->field('001') ) {
+ $sfd{0} = $field->data(),;
+ }
+ $host_field = MARC::Field->new( 461, '0', ' ', %sfd );