Farming systems research : a review /
Simmonds, Norman W., 1914-
Farming systems research : a review / Norman W. Simmonds. - Washington, D.C. : World Bank, c1985. - xii, 97 p. : ill. - World Bank technical paper ; no. 43 .
0821305662
Agricultural systems--Research.
Agriculture--Research--On-farm.
Agricultural systems--Tropics.
S494.5.S95 / S56 1985
630/.72�19
Farming systems research : a review / Norman W. Simmonds. - Washington, D.C. : World Bank, c1985. - xii, 97 p. : ill. - World Bank technical paper ; no. 43 .
0821305662
Agricultural systems--Research.
Agriculture--Research--On-farm.
Agricultural systems--Tropics.
S494.5.S95 / S56 1985
630/.72�19