Hedlin, A. F., Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C., Canada
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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
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