Abstract
Journal Article Present Status of the European Spruce Sawfly, Diprion polytomum (Htg.), in the United States Get access Philip B. Dowden Philip B. Dowden U. S. Department of Agriculture, Bureau of Entomology and Plant Quarantine Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 32, Issue 5, 1 October 1939, Pages 619–624, https://doi.org/10.1093/jee/32.5.619 Published: 01 October 1939
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