Sixth revision of the International register of physiologic races of Puccinia recondita ROB. ex DESM. (formerly P. Rubigo-vera tritici)
By: [C.O. Johnston] ; Agricultural Research Service, U.S. Department of Agriculture
Contributors: United States. Agricultural Research Service
Series: ARS 34 -- 27; ARS 34 -- 27.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1961
Place of publication: [Beltsville, Md.]
Language: eng
Number of pages: 15
Subjects: Leaf rust of wheat
Other titles: International register of physiologic races of Puccinia recondita ROB. ex DESM.
Notes: Cover title.

"ARS 34-27."

"December 1961."

"Crops research."

Includes bibliographical references.