01038nam a2200241 a 4500 2558416 100705s1994 bs a b 000 0 eng d 94982381 DLC DLC BD-DhAAL 631.5/8/0720676 20 Farming systems research approach : a primer for eastern and southern Africa / D.W. Norman ... [et al.]. Gaborone, Botswana : Farming Systems Programme, 1994. xi, 148 p. : ill. ; 30 cm. Includes bibliographical references (p. 136-142). Agricultural systems Research Africa, Eastern. Agricultural systems Research Africa, Eastern. Agricultural systems Research Botswana. Norman, D. W. (David W.) Farming Systems Programme (Botswana) 9176 9176 0 0 ddc 0 0 BRACUL BRACUL GEN 2010-07-05 1 5 631.580720676 FAR 3010011544 2022-12-22 2022-11-30 1 2010-07-05 BK