Ruth, D. S., Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C., Canada

• Journal of the Entomological Society of British Columbia Vol. 76 (1979): Journal of the Entomological Society of British Columbia - Articles
  Observations on a twigminer, Argyresthia pseudotsuga Freeman (Lepidoptera: Yponomeutidae), in Douglas-fir seed orchards
  Abstract  PDF