Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 162 Document Number: C26762
Notes:
Reprinted as pages 69-86 in John P. Brien, "Research contributions in agricultural extension and communication," a thesis submitted for the Degree of Doctor of Agricultural Science, Faculty of Natural Resources, Agriculture and Veterinary Science, University of Queensland., Presented at the 59th annual meeting of the American Association of Agricultural College Editors, Honolulu, Hawaii, 1975.
