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Series USDA agriculture handbooks Remove constraint USDA agriculture handbooks: USDA agriculture handbooks Series USDA agriculture handbooks Remove constraint USDA agriculture handbooks: USDA agriculture handbooks Authors United States. Cooperative State Research Service. Remove constraint United States. Cooperative State Research Service.: United States. Cooperative State Research Service. Subjects Spruce budworm -- Control -- United States Remove constraint Spruce budworm -- Control -- United States: Spruce budworm -- Control -- United States

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