Two dangerous imported plant diseases
By: by Perley Spaulding and Ethel C. Field
Series: Farmers' bulletin / United States Department of Agriculture -- no. 489; Farmers' bulletin (United States. Department of Agriculture) -- no. 489
Publisher: U.S. Dept. of Agriculture
Published: 1912
Place of publication: Washington
Language: eng
Number of pages: 29
Subjects: Blister rust; White pine; Diseases and pests; Potato wart; Potatoes
Notes: Cover title.

Includes bibliographical references.