00992nam--2200361---450-99000189718020331620090213114450.0000189718USA01000189718(ALEPH)000189718USA0100018971820040803d1971----km-y0itay0103----baengUK||||||||001yyFarming Systems in the TropiesHans RuthenbergOxfordClarendon Press1971315 p.28 cm20012001001-------2001338RUTHENBERG,Hans118444ITsalbcISBD990001897180203316III.1. 1658(I H 23)51246 L.M.I HBKUMASIAVER9020040803USA010923COPAT39020050307USA011100RSIAV29020090213USA011144Farming Systems in the Tropies953976UNISA