@book{12139,
	author = {Winchester, Clarence F. and Harvey, Walter Robert,},
	title = {Effects of protein and energy intake on nitrogen retention and growth of cattle},
	publisher = {Agricultural Research Service, U.S. Dept. of Agriculture},
	year = {[1966]},
	series = {[United States. Dept. of Agriculture] Technical bulletin},
	address = {Washington]}
}