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- [6] SPRUCE BUDWORM EGG MASS DENSITY ON BALSAM FIR AND WHITE SPRUCE - LOW POPULATION-LEVELS (LEPIDOPTERA, TORTRICIDAE) GREAT LAKES ENTOMOLOGIST, 1982, 15 (04): : 287 - 296
- [9] SPRUCE BUDWORM EGG MASS DENSITY ON BALSAM FIR - LOW TO EXTREME POPULATION-LEVELS (LEPIDOPTERA, TORTRICIDAE) GREAT LAKES ENTOMOLOGIST, 1982, 15 (04): : 277 - 286