USA: Extension Service, U.S. Department of Agriculture, Washington, D.C.
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D08953
Notes:
Page 10 in Lucinda Crile, Findings from studies of bulletins, news stories, and circular letters. Extension Service Circular 488. Revision of Extension Service Circular 461, which it supersedes. May 1953. 24 pages. Summary of a research project, University of Wisconsin, Madison. 1928. 20 pages.
