 | Patricio Montaldo B. - 1985 - 232 páginas
BEARD , J. Climax vegetation in Tropical America . Ecology 25 ( 2 ) ... Classification of tropical american vegetation types . Ecology 36 ... HARRIS , D. The ecology of swidden cultivation in the Upper Orinoco rain forest , Venezuela . | |
 | 566 páginas
HARRIS , D. R. The ecology of swidden cultivation in the Upper Orinoco rain forest , Venezuela . Geographical Review 61 ( 4 ) : 475–495 . 1971. Trop . Abs . 27 : 1017 ( 52 HAUCK , F. W. Soil fertility and shifting cultivation . | |
 | 388 páginas
HARRIS , D , R . The ecology of swidden cultivation in the Upper Orinoco rain forest ; Venezuela . Geographical Review 61 ( 4 ) : 475 - 495 . 1971 , 24 . HART , D . R . The design and evaluation of bean , corn and manioc polyculture ... | |
 | 168 páginas
HARRIS , D. R. The ecology of swidden cultivation in the Upper Orinoco rain forest , Venezuela . Geographical Review 61 ( 4 ) : 475-495 . 1971. Trop . Abs . 27 : 1017 ( 52 HAUCK , F. W. Soil fertility and shifting cultivation . | |
 | Iica - 160 páginas
HARRIS , D. R. The ecology of swidden cultivation in the Upper Orinoco rain forest , Venezuela . Geographical Review 61 ( 4 ) : 475-495 . 1971. Trop . Abs . 27 : 1017 ( 52 HAUCK , F. W. Soil fertility and shifting cultivation . | |
 | 1975 - 116 páginas
( 1315 HARRIS , D. R. The ecology of swidden cultivation in the Upper Orinoco rain forest . Venezuela . Geographical Review 61 ( 4 ) : 475-495 . ( 1316 1971 . HESMER , H. Combined cultivation of agricultur al crops and forest trees . | |
 | Carmen Villegas - 1974 - 90 páginas
( 207 HARRIS , D. R. The ecology of swidden cultivation in the upper Orinoco rain forest Venezuela . Geographical Review 61 ( 4 ) : 475495. 1971 . ( 208 HECK , G. A. T. Ecología e economía . Flora ( Brasil ) 1 ( 1 ) : 26-27 . 1970 . | |
 | 260 páginas
HARRIS , D . R . The ecology of swidden cultivation in the Upper Orinoco rain forest , Venezuela . Geographical Review 61 ( 4 ) : 475 - 495 . 1971 . 12 . HOLDRIDGE , L . R . Ecological indications of the need for a new approach to ... | |
 | 86 páginas
Milk and beef production systems for the small farmers using crop derivatives ; 1977 progress report . ... ( 11717 ) HARRIS , D. R. The ecology of Swidden in the upper Orinoco rain forest , Venezuela . The Geographical Review 61 ( 4 ) ... | |
 | 84 páginas
Milk and beef production systems for the small farmers using crop derivatives ; 1977 progress report . ... ( 11717 ) HARRIS , D. R. The ecology of Swidden in the upper Orinoco rain forest , Venezuela . The Geographical Review 61 ( 4 ) ... | |
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