Pages 75-76 in Extension Circular 541, Review of Extension Research, January through December 1961, U.S. Department of Agriculture, Washington, D.C. Summary of class research project, Michigan State University, East Lansing. 1961. 82 pages.
Pages 79-80 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Summary of research, Communications Research Center, Michigan State University, East Lansing. 1958. 57 pages.
Pages 79-80 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Summary of research report, master of science in agricultural education, University of Minneapolis, St. Paul. 1959
