TY  - BOOK
AU  - Earl O. Heady
AU  -  John L. Dillon, 
TI  - Agricultural production functions
U1  - 338.1 
PY  - 1960///
CY  - Iowa
PB  - Iowa State University Press
N1  - Earl O. Heady & John L. Dillon: Agricultural production functions.  Iowa.  Iowa State University Press, 1960.--(338.1HEA)
ER  -