@book{12471,
	author = {Johnston, C. O.},
	title = {Physiologic races of Puccinia recondita f. sp. tritici in the United States from 1926 through 1960},
	publisher = {Agricultural Research Service, U. S. Dept. of Agriculture},
	year = {[1968]},
	series = {U.S. Dept. of Agriculture. Technical bulletin;},
	address = {Washington]}
}