Simmonds, Norman W. 1914- Farming systems research : a review / Norman W. Simmonds. - Washington, D.C., U.S.A. : World Bank, c1985. - xii, 97 p. : ill. ; 28 cm. - World Bank technical paper, no. 43 0253-7494 ; . Bibliography: p. 88-95. ISBN: 0821305662 LCCN: 85012181 Subjects--Topical Terms: Agricultural systems--Research.Agriculture--Research--On-farm.Agricultural systems--Tropics. LC Class. No.: S494.5.S95 / S56 1985 Dewey Class. No.: 630.72 / SIF 1985