1. A general systems model for the role analysis of the change agents in the diffusion-adoption of innovations Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Singh, B. Krishna (author) Format: Journal article Publication Date: 1971-03 Published: India Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 43 Document Number: B05117 Journal Title: Indian Journal of Extension Education Journal Title Details: 7 (1/2) : 49-57 Notes: search through journal