@book{11608,
	author = {Waugh, Frederick V.},
	title = {Graphic analysis in agricultural economics.},
	publisher = {U.S. Dept. of Agriculture, Agricultural Marketing Service,},
	year = {1957.},
	series = {Agriculture handbook / United States Department of Agriculture ;},
	address = {Washington, D.C. :},
	note = {Cover title.}
}