USA: Extension Service, U.S. Department of Agriculture, Washington, D.C.
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D08957
Notes:
Page 16 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 research reported by the National Fertilizer Association, Inc., Washington, D.C. 1929. 38 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 70 Document Number: D10763
Notes:
Claude W. Gifford Collection. Beyond his materials in the ACDC collection, the Claude W. Gifford Papers, 1919-2004, are deposited in the University of Illinois Archives. Serial Number 8/3/81. Locate finding aid at https://archives.library.illinois.edu/archon/, Claude W. Gifford Collection. 22 pages., A Farm Journal document that briefly summarizes findings from 18 surveys conducted by universities, advertising firms, farm periodicals, and a trade association between 1957 and 1963.