Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: D08624
Notes:
Located in Review of Extension Studies, volumes for 1946-1956, U.S. Department of Agriculture, Washington, D.C., Summary of U.S. Federal Extension Service, U.S. Department of Agriculture, Washington, D.C. Extension Service Circular 502. 14 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C37134
Notes:
Pages 74-93 in Duncan McGregor, David Simon and Donald Thompson (eds.), The peri-urban interface: approaches to sustainable natural and human resource use. Earthscan, London, England. 336 pages.