Communication strategies for rural development; proceedings of the Cornell-CIAT international symposium

by Crawford, R.H., New York State Coll. of Agriculture and Life Sciences, Ithaca (USA). Program in International Agriculture eng, Cornell-CIAT Int. Symp. on Communication Strategies for Rural Dev. eng 17 Mar 1974 Cali (Colombia) 10524, Ward, W.B., Centro Internacional de Agricultura Tropical, Cali (Colombia) spa
Published Jul