TY  - BOOK
AU  - Schneider,Karl
TI  - Alternative farming systems - economic aspects: january 1990 - october 1991
T2  - Quick bibliography series
SN  - 1052-5378
PY  - 1991///
CY  - Maryland, EUA
PB  - National Agricultural Library
KW  - Cultivos
KW  - Aspectos económicos
KW  - Sistemas de cultivo
ER  -