National Conference on Library Statistics : a conference co-sponsored by the Library Administration Division, American Library Association and the National Center for Educational Statistics, United States Office of Education, June 6-8, 1966, Chicago, Illinois
edited by Alphonse F. Trezza and James Beasley
American Library Association, 1967
Proceedings performed pursuant to U.S. Office of Education contract no. OEC 3-6-000553-0553