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Theo Pergande

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North American Phylloxerinae Affecting Hicoria (Carya) and Other Trees
North American Phylloxerinae Affecting Hicoria and Other Trees
Mexican Formicidae.
North American Phylloxerinae Affecting Hicoria (Carya) and Other Trees [ 1904 ]
The Life History of Two Species of Plant-Lice Inhabiting Both the Witch Both the Witch-Hazel and Birch (Classic Reprint)
The Life History of the Alder Blight Aphis (Classic Reprint)
North American Phylloxerinae affecting Hicoria (Carya) and other trees
The Life History of the Alder Blight Aphis (Classic Reprint)