Progress of farm mechanization /
Cooper, M. R. 1887-
Progress of farm mechanization / by Martin R. Cooper, Glen T. Barton, and Albert P. Brodell. - Washington, D.C. : U.S. Dept. of Agriculture, 1947. - 101 p. : ill., maps ; 23 cm. - Miscellaneous publication / United States Department of Agriculture ; no. 630 . - Miscellaneous publication (United States. Department of Agriculture) ; no. 630. .
Contribution from Bureau of Agricultural Economics. Cover title.
agr48000040
Agriculture--United States.
Agricultural machinery.
Agriculture--Economic aspects--United States.
S751 / .C6
1 / Ag84M no.630
Progress of farm mechanization / by Martin R. Cooper, Glen T. Barton, and Albert P. Brodell. - Washington, D.C. : U.S. Dept. of Agriculture, 1947. - 101 p. : ill., maps ; 23 cm. - Miscellaneous publication / United States Department of Agriculture ; no. 630 . - Miscellaneous publication (United States. Department of Agriculture) ; no. 630. .
Contribution from Bureau of Agricultural Economics. Cover title.
agr48000040
Agriculture--United States.
Agricultural machinery.
Agriculture--Economic aspects--United States.
S751 / .C6
1 / Ag84M no.630