LC classification, additions and changes /
Office for Subject Cataloging Policy, Collections Services.
APA Citation
Library of Congress. Office for Subject Cataloging Policy. (19901992). LC classification, additions and changes. Washington: Library of Congress .
MLA Citation
Library of Congress. Office for Subject Cataloging Policy. LC Classification, Additions And Changes. Washington: Library of Congress , 19901992.
Warning: These citations may not always be complete (especially for serials).