TY  - BOOK
AU  - Gates,Jane Potter
TI  - Farming systems research: january 1979 - december 1991
T2  - Quick bibliography series
SN  - 1052-5378
PY  - 1992///
CY  - Maryland, EUA
PB  - National Agricultural Library
KW  - Agricultura
KW  - Investigación
KW  - Bibliografía
KW  - Sistemas de cultivo
ER  -