Page 72 in Review of Extension Research, January through December 1957. Brief description of Extension Circular 514, U.S. Federal Extension Service, U.S. Department of Agriculture, Washington, D.C. 1957. 83 pages.
Page 85 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Brief description of an update of a document of the same title, Journal Series 2047, Missouri Agricultural Experiment Station, University of Missouri, Columbia. 1959. 20 pages.
