Observations on the use of GYPCHEK
By: by F.B. Lewis ... [et al.].
Contributors: Lewis, Franklin B.; United States. Forest Service.
Series: Research paper NE -- 447.
Publisher: Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station
Published: 1979
Place of publication: Broomall, Pa
Language: eng
Subjects: Aerial spraying and dusting in agriculture -- United States; Gypsy moth -- Biological control -- United States
Notes: Cover title.

Bibliography: p. 8.