TY  - BOOK
ED  - U.S. Department of Agriculture
TI  - Changes in Farm: Production and Efficiency: A Summary Report 
T2  - statistical Bulletin
U1  - 73 SD:338.14 
PY  - 1961///
CY  - Washington D.C.
PB  - U.S. Department of Agriculture
KW  - Agriculture
ER  -