Thinning to prevent mountain pine beetles in lodgepole and ponderosa pine
By: [prepared by Gary B. Pitman, David A. Perry and William H. Emmingham].
Contributors: Perry, David A.; Emmingham, William H.; Oregon State University. Extension Service.
Series: Woodland workbook; Extension circular / Oregon State University Extension Service -- 1106.; Extension circular (Oregon State University. Extension Service) -- 1106.
Publisher: Oregon State University Extension Service
Published: 1982
Place of publication: Corvallis, Or
Language: eng
Subjects: Mountain pine beetle -- Control.; Lodgepole pine -- Diseases and pests -- Control.; Ponderosa pine -- Diseases and pests -- Control.
Notes: Title from caption.

"September 1982."