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 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.