TY  - BOOK
AU  - Herren,Ray V.
TI  - The science of agriculture: a biological approach 
SN  - 0827358113
AV  - S495 H47
U1  - 630 20
PY  - 1997///
CY  - Albany, New York
PB  - Delmar Publishers
KW  - Agricultura
N1  - Incluye indice
ER  -