http://tags.library.upenn.edu/tag/cataloging+classification PennTags Feed http://tags.library.upenn.edu/makerecord/url/10564 http://tags.library.upenn.edu/makerecord/url/10564 Helpful resources from Library of Congress, e.g. LC classification outline, cataloging-in-publication, MARC 21 standards, digital refernce, etc.<br /> http://tags.library.upenn.edu/makerecord/url/2238 http://tags.library.upenn.edu/makerecord/url/2238