The spruce budworm on Michigan pine
By: by Samuel A. Graham.
Series: Bulletin / University of Michigan School of Forestry and Conservation -- no. 6; Bulletin (University of Michigan. School of Forestry and Conservation) -- no. 6
Publisher: University of Michigan Press
Published: 1935
Place of publication: Ann Arbor
Language: eng
Number of pages: 56
Subjects: Spruce budworm -- Michigan; Pine -- Diseases and pests -- Michigan