Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 15 Document Number: B01883
Notes:
#1253, Harold Swanson Collection, Washington, D.C.: Cooperative Extension Service, U.S. Department of Agriculture, 1952. 24 p. (Agriculture Handbook 42)
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 25 Document Number: B02499
Notes:
#759, Harold Swanson Collection. Review of Extension Research 1946/47-1956, Extension Service Circular 506, U.S. Department of Agriculture, Washington, D.C., Columbia, MO: University of Missouri, 1952. 64 p.
