 | 84 páginas
( 11460 ) GILLY T. Shifting agriculture : new aspects of an old problem . Roma , FAO , 1967. pp . 10-22 . 11 refs . ... ( 11467 ) WOOD , R. G. Agricultural systems in the Nuba Mountains , Sudan . Dissertation Abstracts International B ... | |
 | 84 páginas
( 11460 ) GILL , T. Shifting agriculture : new aspects of an old problem . Roma , FAO , 1967. pp . 10-22 . 11 refs . ... ( 11467 ) WOOD , R. G. Agricultural systems in the Nuba Mountains , Sudan . Dissertation Abstracts International B ... | |
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