Preliminary report on the insect enemies of forests in the Northwest
Subtitle: An account of the results gained from a reconnaissance trip made in the spring and early summer of 1899
By: prepared by A.D. Hopkins
Series: Bulletin / United States. Dept. of Agriculture. Division of Entomology -- no. 21, new ser.; Bulletin (United States. Division of Entomology) -- no. 21, new ser.
Publisher: U.S. Dept. of Agriculture, Division of Entomology
Published: 1899
Place of publication: Washington, D.C
Language: eng
Number of pages: 27
Subjects: Insect pests; Trees; Diseases and pests