(1988). Agricultural extension: Guidelines for extension workers in rural areas. St. Gallen, Switzerland: Swiss Centre for Development Cooperation in Technology and Management.
Παραπομπή Chicago StyleAgricultural Extension: Guidelines for Extension Workers in Rural Areas. St. Gallen, Switzerland: Swiss Centre for Development Cooperation in Technology and Management, 1988.
Παραπομπή MLAAgricultural Extension: Guidelines for Extension Workers in Rural Areas. St. Gallen, Switzerland: Swiss Centre for Development Cooperation in Technology and Management, 1988.
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