A ponderosa pine tee classification
By: by F. P. Keen
Contributors: United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations
Publisher: United States Bureau of Entomology and Plant Quarantine
Published: 1937
Place of publication: Portland, Oregon
Language: eng
Subjects: Ponderosa pine
Notes: Issued June 1, 1937.