TY  - BOOK
ED  - United States.
ED  - United States.
TI  - Technology on the farm: A special report
AV  - S441 .A15 1940
U1  - 630.973 
PY  - 1940///
CY  - [Washington]
PB  - U.S. Govt. Print. Off.
KW  - Agriculture
KW  - United States
KW  - Agricultural engineering
KW  - Economic aspects
ER  -