Douglas-fir cone insects and their control
By: by Norman E. Johnson and Alan F. Hedlin.
Contributors: Hedlin, Alan F., joint author.
Publisher: Queen's Printer
Published: 1967
Place of publication: [Ottawa
Language: eng
Number of pages: 11
Subjects: Douglas fir -- Diseases and pests.; Insect pests -- Control -- Canada.
Notes: Cover title.