Insect-caused damage to the 1956 Douglas-fir cone crop in California
By: Robert E. Stevens
Contributors: California Forest and Range Experiment Station
Series: Research note / California Forest and Range Experiment Station -- no. 120; Research note (California Forest and Range Experiment Station) -- no. 120.
Publisher: California Forest and Range Experiment Station
Published: 1957
Place of publication: Berkeley, Calif
Language: eng
Subjects: Douglas fir; Diseases and pests
Notes: Caption title.

"February 18, 1957."