TY  - BOOK
AU  - Malik Ravinder Pal Singh
AU  - University of Delhi. Department Economics
ED  - University of Delhi. Department Economics
TI  - Otimum factor combination in agriculture :  A progr
U1  - "X9(J):2.243S.N9, N1/Th" 
PY  - 1991///
CY  - Delhi
PB  - University of Delhi India    
KW  - Agriculture Industry
ER  -