1. The training and demonstration system of agricultural extension : a Nigerian experience Collection: Agricultural Communications Documentation Center (ACDC) Contributers: China, Richard A. (author) and Langmead, Peter (author) Format: Journal article Publication Date: 1984 Published: Nigeria Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 79 Document Number: C04513 Journal Title: Development Communication Report Journal Title Details: 47 : 7, 13