TY  - BOOK
AU  - Heady, Earl O.
TI  - Agricultural production functions
U1  - 338:63 K1 
PY  - 1961///
CY  - Ludhiana
PB  - Kalyani
KW  -  Earl O.Heady and John L.Dillon.
KW  - Dillon, John, L., jt. author
KW  - Agricultural production
ER  -