00263nam a2200109Ia 450000500170000008000180001710000190003524500330005426000360008730000110012358300190013420260716043103.0  a07.01.02 D489  aSpeedy, Andrew  aDeveloping world agriculture  bGrosvenor PressaLondonGBc1990  a286 p.  c3/7/00kM2LMGR