@book{16938,
	author = {Fehr, Walter R. and American Society of Agronomy. ASA. },
	title = {Genetic contributions to yield gains of five major crop plants.},
	publisher = {Crop Science Society of America :},
	year = {c1984.},
	address = {Madison, WI :},
	note = {Proceedings of a symposium..2 Dec. 1981,in Atlanta,Georgia.}
}