Pages 64-65 in Extension Circular 534, Review of Extension Research, January through December 1960, U.S. Department of Agriculture, Washington, D.C. Summary of a thesis for the master of science degree, Michigan State University, East Lansing. 1960. 120 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.