Torgersen, Torolf R., Institute of Northern Forestry Pacific Northwest Forest and Range Experiment Station Forest Service U.S. Department of Agriculture Juneau, Alaska., United States

• Journal of the Entomological Society of British Columbia Vol. 66 (1969): Journal of the Entomological Society of British Columbia - Articles
  Hymenopterous parasites of the hemlock sawfly, Neodiprion tsugae Middleton, in southeast Alaska, with a key to larval remains
  Abstract  PDF