TY  - BOOK
AU  - Spencer, J. E.
TI  - Shifting cultivation in southeaster Asia
U1  - 631.5 
PY  - 1966///
CY  - Berkeley, Cal.
PB  - University of California
KW  - Agricultura
KW  - Trópicos
KW  - Roza
KW  - Sistemas de cultivo
ER  -