TY  - BOOK
AU  - Chapman, Stephen R
AU  - Carter, C P
TI  - Crop production: principles and practices
SN  - 0716705818
U1  - 631.3/CHA 
PY  - 1976///
CY  - San Francisco
PB  - W H Freeman and Company
KW  - Field crops
KW  - North America
ER  -