TY  - BOOK
AU  - McElroy, Robert C.
AU  - Hecht, Reuben W.
AU  - Gavett, Earle E.
ED  - U. S. Department of Agriculture
TI  - Labor used to produce field crops: : estimates by states
U1  - 73 SD:338.14 
PY  - 1964///
CY  - Washington
PB  - U. S. Department of Agriculture
ER  -