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呈現:
Insect Pests of Elms in Connecticut
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The Gypsy Moth Porthetria Dispar Linn.
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Second Report of the Tree Protection Examining Board
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Experiments in Dusting Versus Spraying on Apples and Peaches in Connecticut in 1921
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Plant Pest Handbook for Connecticut; no.344
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The San José Scale and Methods of Controlling It
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