Pages 74-75 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Summary of research report, Extension Service, Michigan State University, E. Lansing. 1959. 17 pages.
Page 77 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Summary of research report by the Information Division, Agricultural Research Service, U.S. Department of Agriculture, Washington, D.C. 1959. 46 pages.
Page 74 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Summary of research paper for a master of science degree in agricultural journalism, University of Wisconsin, Madison. 1959. 49 pages.
