Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 1-5

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 5-10

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 10-12

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 12-22

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 23-36

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 36-38

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 56-57

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 58-64

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 65-79

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 79-81

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 81-83

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Published in Jour Washington Acad Sci, in 1937, in volume 27, pages 105-111

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 114-130

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Published in Jour Washington Acad Sci, in 1937, in volume 27, pages 143-146

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 146-164

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 165-176

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 203-209

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Published in Jour Washington Acad Sci, in 1937, in volume 27, pages 209-213

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 255-261

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 312-316

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 329-343

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 354-357

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 373-374

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 402-404

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 412-414

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 418-423

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 423-431

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 431-438

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 438-444

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 444-448

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 449-451

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 452-458

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 461-474

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 474-479

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 479-482

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 495-501

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 517-531

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, pages 531-535

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, issue 7, pages 304-312

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Published in Journal of The Washington Academy of Sciences, in 1937, in volume 27, issue 9, pages 374-391

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