00919cam a22002411 4500 agr68000164 DLC 20260227111030.0 901015s1968 dcu b f000 0 eng c agr68000164 U.S. Nat'l Agr. Library DLC DLC S21 .A72 no. 1393 Ag84Te no. 1393 630/.8 s Physiologic races of Puccinia recondita f. sp. tritici in the United States from 1926 through 1960 [by C. O. Johnston and others. Washington] Agricultural Research Service, U. S. Dept. of Agriculture [1968] 18 p. 23 cm. U.S. Dept. of Agriculture. Technical bulletin; no. 1393 Bibliography: p. 18. Puccinia recondita. Johnston, C. O. (Charles Otis), 1893-1965. Technical bulletin (United States. Department of Agriculture) ; no. 1393. 12471 12471