@book{11930,
	author = {Christensen, Raymond P. and Hendrix, William E.},
	title = {How the United States improved its agriculture /},
	publisher = {Development and Trade Analysis Division, Economic Research Service, U.S. Dept. of Agriculture,},
	year = {1964.},
	address = {Washington, D.C. :},
	note = {Cover title.}
}