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The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

The Bombidae of the New World - Franklin, Henry J. (American Entomological Society, 1913)

Bulletin of the British Museum (Natural History) Entomology - British Museum (Natural History) (The Museum, 1991)

Bulletin of the Brooklyn Entomological Society - Brooklyn Entomological Society (The Society, 1921)

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Bumblebees and their ways - Plath, O. E. (Otto Emil), 1885 -1940 (The Macmillan Company, 1934)

Bumblebees and their ways - Plath, O. E. (Otto Emil), 1885 -1940 (The Macmillan Company, 1934)

Bumblebees and their ways - Plath, O. E. (Otto Emil), 1885 -1940 (The Macmillan Company, 1934)

Bumblebees and their ways - Plath, O. E. (Otto Emil), 1885 -1940 (The Macmillan Company, 1934)

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Field book of insects, with special reference to those of northeastern United States, aiming to answer common questions - Lutz, Frank Eugene, 1879 -1943 (G. P. Putnam, 1921)

Field book of insects, with special reference to those of northeastern United States, aiming to answer common questions - Lutz, Frank Eugene, 1879 -1943 (G. P. Putnam, 1921)

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The insect book : a popular account of the bees, wasps, ants, grasshoppers, flies and other North American insects exclusive of the butterflies, moths and beetles, with full life histories, tables and bibliographies - Howard, L. O. (Leland Ossian), 1857 -1950 (Doubleday, Page, 1912)

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