TY  - BOOK
AU  - Upton,Martin
TI  - The economics of tropical farming systems
SN  - 0521483409 
AV  - HD 2117 .U68 1996
PY  - 1996///
CY  - New York
PB  - Cambridge University Press
KW  - Farming systems
KW  - Natural resources
N1  - Includes bibliographical references and index
ER  -