Pages 74-75 in Extension Service Circular 544, Review of Extension Research, January through December 1961, U.S. Department of Agriculture, Washington, D.C. Summary of thesis for the doctor of philosophy degree in cooperative extension administration, University of Wisconsin, Madison. 1960. 155 pages.
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.
Page 60 in Extension Circular 541, Review of Extension Research, January through December 1961, U.S. Department of Agriculture, Washington, D.C. Summary of Ohio Agricultural Experiment Station Research Bulletin 890 of this title, Ohio State University, Wooster. 1961. 18 pages.
