THE SPRUCE GALL APHID (Adelges Abietis Linnaeus) in Southern Michigan. University of Michigan, School of Forestry and Conservation, Circular No. 2.
University of Michigan Press: Ann Arbor, 1937. Item #96-9258
9 x 6, wrappers, 35 pp, 8 figures, bib, library stamps to front wrapper, upper fore corner bumped. FIRST ED.