• 2 Books

• 1 Diseases and pests
• 1 Forest ecology
• 1 Forest insects
• 1 Research
• 1 Vegetation classification
• 1 Yellow-headed spruce sawfly

• 1 Pacific Northwest Research Station (Portland, Or.)
• 1 Snyder, Cynthia
• 1 United States. Forest Service. Alaska Region
• 1 Viereck, Leslie A

• 2 English

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