@book{10760,
	author = {Cooper, M. R. and Barton, Glen T.},
	title = {Progress of farm mechanization /},
	publisher = {U.S. Dept. of Agriculture,},
	year = {1947.},
	series = {Miscellaneous publication / United States Department of Agriculture ;},
	address = {Washington, D.C. :},
	note = {Contribution from Bureau of Agricultural Economics.}
}