photographic technique for estimating egg density of the white pine weevil, Pissodes strobi (Peck)
By: Roger T. Zerillo.
Series: Research paper NE -- 318.
Publisher: Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station
Published: 1975
Place of publication: Upper Darby, Pa
Language: eng
Subjects: White-pine weevil -- Eggs; Photography, Biological
Notes: Cover title.

Bibliography: p. 4.