The classified catalog : basic principles and practices / by J.H. Shera and M.E. Egan ; with a code for the construction and maintenance of the classified catalog by J.M. Lynn and Z. Hilton. Shera, Jesse H. Egan, Margaret E. Classified catalogs. 025.3 SHC Includes index. Bibliographies: p. 122-127. Chicago : American Library Association, 1956. 1956. 1956 Text xi, 130 p. : eng