A field guide to important forest insects and diseases of Oregon and Washington
By: by L.F. Pettinger and D.J. Goheen
Contributors: Goheen, D. J; United States. Forest Pest Management
Edition: 1972, updated 1982
Publisher: Forest Pest Management, State and Private Forestry, Pacific Northwest Region, Forest Service, U.S. Dept. of Agriculture
Published: 1982
Place of publication: [Portland, Or.?]
Language: eng
Number of pages: 37
Subjects: Forest insects -- Oregon -- Identification; Forest insects -- Washington (State) -- Identification; Conifers -- Diseases and pests -- Oregon -- Identification; Conifers -- Diseases and pests -- Washington (State) -- Identification