Page 26 in Extension Circular 521, Review of Extension Research, January through December 1958, U.S. Department of Agriculture, Washington, D.C. Summary of a research paper for a Master of Science degree in agricultural journalism, University of Wisconsin, Madison. 1958. 66 pages.
Pages 77-78 in Extension Circular 521, Review of Extension Research, January through December 1958, U.S. Department of Agriculture, Washington, D.C. Summary of a research project report, Louisiana State University, Baton Rouge. 1958. 59 pages.
Page 78 in Extension Circular 521, Review of Extension Research, January through December 1958, U.S. Department of Agriculture, Washington, D.C. Summary of research reported in Missouri Agricultural Experiment Station Bulletin 702, University of Missouri, Columbia. 1958. 16 pages.
