The spruce gall aphid (Adelges Linnaeus) in southern Michigan
By: by Bill Howard Wilford.
Series: University of Michigan. School of forestry and conservation. Circular; no. 2
Publisher: University of Michigan press
Published: 1937
Place of publication: Ann Arbor
Language: eng
Number of pages: 34
Subjects: Adelges abietis.; Spruce -- Diseases and pests.
Notes: Thesis (PH. D.)-University of Michigan.
Thesis note on p. 7.