Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D01229
Notes:
Pages 209-222 in Steven A. Wolf (ed.), Privatization of agricultural information and agricultural industrialization. CRC Press, Boca Raton, New York, New York. 299 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C19155
Notes:
Pages 111-170 in U.S. Department of Agriculture, "Farmers in a changing world," 1940 Yearbook of Agriculture, U.S.Government Printing Office, Washington, D.C. 1,215 pages.