00622nam a2200169Ia 4500 0000021507 20251012174641.0 1992 uk c 086531425X Farming systems research and development guidelines for Developing Countries W.W.Shaner, P.F. Philipp [and] W.R.Schmehl Colorado Westview Press Inc. c1992 xviii,414p. ill. 28cm. Include indexs Agriculture Research Developing Countries Agriculture systems Developing Countrie Agriculture Developing Countries 8053 8053