Toxicology. (OSt)1363 #### Research work (OSt)1000 #### my $twig = XML::Twig->new( twig_handlers => { subfield => \&editSubfield, }, pretty_print => 'indented', ); $twig->parse($xml); sub editSubfield { my ( $twig, $href) = @_; my $text = $href->text(); $href->set_text($rcnnew) if $text eq $rcnorig; } #### 00722cam a2200241 4500 1278 19830304000000.0 690320s1969 mdu b 001 0 eng 68022712 DLC DLC NOH RA1211 .G5 1969 615.9 Gleason, Marion N. (OSt)1362 Clinical toxicology of commercial products; acute poisoning by Marion N. Gleason and others 3d ed. Baltimore, Williams & Wilkins, 1969. 1 v. (various pagings) 26 cm. Includes bibliographies. Toxicology. (OSt)1363 Poisons. (OSt)1364 AAA-0400 QV 600 G554 1969 391 391