Canadian Forest Service Publications
Separation of the European spruce sawfly in America from Gilpinia polytoma (Htg.) (Diprionidae: Hymenoptera) and evidence of its introduction. 1941. Balch, R.E.; Reeks,W.A.; Smith, S.G. Canadian Entomologist 198-203.
Issued by: Great Lakes Forestry Centre
Catalog ID: 38088
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