The Dutch elm disease
By: by Curtis May
Contributors: United States. Dept. of Agriculture
Series: Dept. of Agriculture circular -- no. 170
Publisher: U.S. Dept. of Agriculture; [for sale by the Supt. of Docs., G.P.O.]
Published: 1931
Place of publication: Washington, D.C
Language: eng
Number of pages: 10
Subjects: Dutch elm disease; Trees; Diseases and pests