00547     2200169   4500001002100000035002000021245013900041100002000180260004500200300002700245084001700272082001700289650002000306650001200326650003000338990000900368INLIS000000000005867  a0010-1021000701  aRaising and sustaining Productivity of Smallholder Farming Systems in the TropicsbA. Handbook of Sustainable Agricultural Development  aWillem C. Beets  aAlkmaarbHolland: Ag Be Publishingc1990  aXVI, 738p;cill; 27 cm  aRef. 631. 58  aRef. 631. 58  aFARMING SYSTEMS  aTROPICS  aAGRICULTURAL DEVELOPMENT.  a5091