Page 65 in Review of Extension Research, January through December 1957. Summary of a survey for Agricultural Extension, Texas Agricultural College, College Station. 1957. 14 pages.
Pages 61-62 in Extension Circular 534, Review of Extension Research, January through December 1960, U.S. Department of Agriculture, Washington, D.C. Summary of ER&T-38 (3-60), Federal Extension Service, U.S. Department of Agriculture, Washington,D.C. 1960. 4 pages.