TY  - BOOK
AU  - Earl O. Heady
AU  -  Glenn L. Johnson  Lowell S. Hardin
TI  - Resource productivity, returns to scale, and farm size
U1  - 658.93 
PY  - 1956///
CY  - Amestrdom
PB  - Iowa State College Press
N1  - Earl O. Heady; Glenn L. Johnson & Lowell S. Hardin: Resource productivity, returns to scale, and farm size.  Amestrdom.  Iowa State College Press, 1956.--(658.93HEA)
ER  -