@book{11498,
	author = {Combs, Willis B. and Smith, Fred G.},
	title = {Grain grading primer /},
	publisher = {U.S. Dept. of Agriculture,},
	year = {1953.},
	series = {Agriculture handbook / United States Department of Agriculture ;},
	address = {Washington, D.C. :},
	note = {Slight revision of Miscellaneous publication 325.}
}