TY  - BOOK
AU  - Agrawal, R. C.
AU  - Heady, Earl  O.
TI  - Operation research : methods for agricultural decisions
U1  - 338.10184 
PY  - 1972///
CY  - Ames
PB  - Iowa State Uni. & American Concrete Inst.
N1  - ENG
ER  -