@book{12173,
	author = {Waugh, Frederick V.},
	title = {Graphic analysis :},
	publisher = {U.S. Dept. of Agriculture, Economic Research Service ; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,},
	year = {1968]},
	address = {Washington,},
	note = {Cover title.}
}