Ullstrup, Arnold John.

Corn diseases in the United States and their control / [by A. J. Ullstrup. - Rev. - Washington] : Agricultural Research Service, U.S. Dept. of Agriculture; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.], [1961] - iv, 29(9) p. : ill. (part col.) ; 24 cm. - United States. no. 199 .

Corn--Diseases and pests--United States.
Corn--Diseases and Pests.