Factors of spread and repression in potato wart
By: by Freeman Weiss and Philip Brierley.
Contributors: Brierley, Philip, 1899-; United States. Dept. of Agriculture.
Series: Technical bulletin / United States Department of Agriculture -- no. 56; Technical bulletin (United States. Dept. of Agriculture) -- no. 56.
Publisher: U.S. Dept. of Agriculture
Published: 1928
Place of publication: Washington
Language: eng
Number of pages: 14
Subjects: Potato wart -- Control.
Notes: Caption title.

Literature cited: p. 13.