TY  - BOOK
AU  - Duroet,Donald D.
AU  - Black,Evelyn T.
ED  - United States.
ED  - United States.
ED  - United States.
ED  - United States.
ED  - United States.
TI  - Changes in farm production and efficiency
SN  - 0731-3217
U1  - 338.10973021. 
PY  - 1978///
CY  - Washington, D.C.
PB  - U.S. Agricultural Research Service, Production Economics Research Branch
KW  - Agriculture
KW  - United States
KW  - Statistics
KW  - Economic aspects
KW  - Agricultural productivity
ER  -