Pages 68-69 in Review of Extension Research, January through December 1957. Summary of a thesis for the Master of Science degree at the University of Illinois, Urbana. 95 pages. 1956.
Page 8 in Extension Circular 534, Review of Extension Research, January through December 1960, U.S. Department of Agriculture, Washington, D.C. Summary of Research Bulletin 850, Ohio Agricultural Experiment Station, Ohio State University,Columbus. 1960. 38 pages.
Pages 66-67 in Review of Extension Research, January through December 1957. Summary of a thesis for the Master of Science degree at Iowa State College, Ames. 1957. 85 pages.