Page 31 in Extension Circular 541, Review of Extension Research, January through December 1961, U.S. Department of Agriculture, Washington, D.C. Summary of a thesis for the doctor of philosophy degree in speech at Purdue University, Lafayette, Indiana. 1960. 289 pages.
Pages 86-87 in Extension Circular 541, Review of Extension Research, January through December 1961, U.S. Department of Agriculture, Washington, D.C. Summary of a thesis for the master of science degree in agricultural extension, University of Tennessee, Knoxville. 1961. 281 pages.
