Immroth, John Phillip. A guide to Library of Congress classification / John Phillip Immoroth - Rochester, N.Y. Libraries Unlimited 1968. - 356 p. illus. 24 cm. - Library science text series . Includes bibliographies. LCCN: 68019094 Subjects--Topical Terms: Classification, Library of Congress LC Class. No.: Z 696 .V4 / I33 1968 Dewey Class. No.: 025.4/3