TY  - GEN
AU  - Ruddle,Kenneth
TI  - The yukpa cultivation system: a study of shifting cultivation in Colombia and Venezuela 
U1  - 980.61 21
PY  - 1974///
CY  - Berkeley, Calf.
PB  - University of California Press
KW  - INDÍGENAS DE COLOMBIA
KW  - YUKPA
KW  - LEMB
KW  - INDÍGENAS DE VENEZUELA
KW  - VIDA SOCIAL Y COSTUMBRES
ER  -