00765nam0-22002891i-450-99000655969040332120001010000655969FED01000655969(Aleph)000655969FED0100065596920001010d--------km-y0itay50------baitay-------001yyFarming Systems in the Tropicsdi RUTHENBERG Hans2OxfordClarendon Press1976XVIII, 366 p.22 cmRuthenberg,Hans118444ITUNINARICAUNIMARCBK990006559690403321XI A 804290FSPBCFSPBCFarming Systems in the Tropics515024UNINAGEN01