Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 1-14
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 21-36
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 41-44
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 45-46
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 51-63
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 63-92
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 109-117
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 118-137
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 146-161
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 161-170
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 171-173
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 173-175
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 175-177
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 177-178
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 219-221
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 261-269
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 273-286
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 287-291
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 292-300
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 317-330
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 336-339
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 340-350
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 357-368
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 379-381
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 382-391
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 391-402
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 441-451
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 452-459
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 469-473
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 495-501
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 501-515
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, pages 517-519
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 519-528
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Published in Jour Washington Acad Sci, in 1939, in volume 29, pages 529-543
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Published in Journal Acad Sci Washington, in 1939, in volume 29, issue 1, pages 14-20
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, issue 1, pages 39-41
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, issue 4, pages 141-146
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Published in Journal of The Washington Academy of Sciences, in 1939, in volume 29, issue 11, pages 474-492
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