I025.3 She C Shera, Jesse Hauk, 1903- The classified catalog; basic principles and practices, by Jesse H. Shera and Margaret E. Egan, with a code for the construction and maintenance of the classified catalog by Jeannette M.Lynn and Zola Hilton.Chicago, American Idbrary Association, 1956. xi, 130 p. modelos. 24 cm.