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Published in Asa Gray correspondence. Senders B-Ba, in 1889, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1889, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1889, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1896, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1895, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1895, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1895, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1895, pages 1

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Published in Asa Gray correspondence. Senders B-Ba, in 1895, pages 1-2

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Published in Asa Gray correspondence. Senders B-Ba, in 1878, pages 1-2

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Published in Proc. Biol. Soc. Washington, in 1927, in volume 40, pages 91-92

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Published in Proceedings of The Biological Society of Washington, in 1932, in volume 45, pages 183-187

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Published in Journal of The Washington Academy of Sciences, in 1924, in volume 14, pages 174-177

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Published in Breviora, in 1963, in volume 186, pages 1-13

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Published in Biol Bull, in 1911, in volume 20, pages 332-349

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Published in Proceedings of The Biological Society of Washington, in 1923, in volume 36, pages 91-92

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