Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 60-61

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 66-75

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Published in Jour Washington Acad Sci, in 1928, in volume 18, pages 96-102

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Published in Jour Washington Acad Sci, in 1928, in volume 18, pages 145-158

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Published in Jour Washington Acad Sci, in 1928, in volume 18, pages 177-178

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Published in Jour Washington Acad Sci, in 1928, in volume 18, pages 194-196

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 197-200

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 233-241

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 241-249

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 249-253

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 306-313

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 316-317

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 381-382

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Published in Jour Washington Acad Sci, in 1928, in volume 18, pages 421-430

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 561-563

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, pages 577-582

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 1, pages 5-10

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 2, pages 25-37

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 7, pages 178-186

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 8, pages 203-206

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 8, pages 216-226

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 10, pages 273-282

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 15, pages 430-433

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Published in Journal of The Washington Academy of Sciences, in 1928, in volume 18, issue 18, pages 485-498

Created: 2015-03-16, modified: 2015-03-16