Subject headings used in the dictionary catalogs of the library of congress /Library of congress, January 1956-December 1958 supplement to the 6th edition - 6th ed. - Washington, D.C.: Library of congress, 1959 - 378p. Subjects--Topical Terms: Subject headings Subjects--Index Terms: Dictionary catalogs Subject cataloging division Universal Decimal Class. No.: D 025.343 / J7.1