Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C19055
Notes:
Pages 96-119 in Rajab Ali Memon, managing author, and Elena Bashir, editor, Extension methods. National Book Foundation, Islamabad, Pakistan. 378 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C20704
Notes:
132 pages, Includes an historical overview of diffusion research from the 1940s to the 1970s, plus a discussion of recent trends and prospects for the future.