Published in Journal of The Washington Academy of Sciences, in 1936, in volume 25, issue 7, pages 311-325

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 6-16

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 16-23

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 31-32

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 32-34

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 34-40

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 41-45

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 52-59

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 60-64

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 64-66

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 66-70

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 70-83

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 111-120

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 128-133

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 162-165

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 165-177

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 181-182

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 199-207

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 294-296

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 296-298

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Published in Journal of the Washington Academy of Sciences, in 1936, in volume 26, pages 298-303

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 324-331

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Published in Jour Washington Acad Sci, in 1936, in volume 26, pages 331-346

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 358-61

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 361-365

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 365-376

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 376-382

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 404-409

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 410-414

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 414-419

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 420-423

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 423-430

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 430-434

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 462-464

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 464-466

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 528-530

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 535-8

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 538-543

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, pages 543-545

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, issue 1, pages 24-31

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, issue 4, pages 156-162

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, issue 4, pages 177-179

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Published in Journal of the Washington Academy of Sciences, in 1936, in volume 26, issue 5, pages 213-222

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Published in Journal of The Washington Academy of Sciences, in 1936, in volume 26, issue 11, pages 452-460

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