Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C19825
Notes:
Pages 205-218 in William M. Rivera and Daniel J. Gustafson (eds.), Agricultural extension: worldwide institutional evolution and forces for change. Elsevier Science Publishers, Amsterdam, The Netherlands. 312 pages.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C19063
Notes:
Burton Swanson Collection, Pages 348-361 in Rajab Ali Memon, managing author, and Elena Bashir, editor, Extension methods. National Book Foundation, Islamabad, Pakistan. 378 pages.