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Published in Asa Gray correspondence. Senders Ca-Cl, in 1890, pages 1
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Published in Transactions of The American Microscopical Society, in 1916, in volume 35, pages 141-148
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Published in Transactions of The American Microscopical Society, in 1916, in volume 35, pages 65-73
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Published in Biol Bull, in 1977, in volume 152, pages 12-25
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Published in Asa Gray correspondence. Senders J, 1844-1891 (inclusive), in 1890, pages 1-2
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Published in Asa Gray correspondence. Senders J, 1844-1891 (inclusive), in 1890, pages 1-2
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Published in Asa Gray correspondence. Senders J, 1844-1891 (inclusive), in 1890, pages 1
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