Published in Journal of The Washington Academy of Sciences, in 1950, in volume 39, pages 389-398
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 39, pages 398-409
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 39, pages 409-416
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 5-19
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 21-22
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 22-28
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Published in Journal of the Washington Academy of Sciences, in 1950, in volume 40, pages 50-55
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 56-59
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 59-61
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 75-79
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 79-82
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 82-87
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 87-92
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 92-93
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 126-129
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 129-133
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 133-136
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 157-161
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 161-163
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 164-166
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 166-169
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 177-183
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 194-198
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 207-08
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 217-225
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 225-228
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 229-236
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 238-239
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 245-247
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 248-260
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 260-265
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 266-268
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 269-272
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 273-277
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 277-282
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 285-289
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 289-291
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 291-295
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 295-298
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 298-299
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 299-300
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 301-302
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 317-321
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 355-361
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 361-371
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 371-378
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 378-381
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 381-384
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 397-404
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 405-409
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 413-415
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Published in Jour Washington Acad Sci, in 1950, in volume 40, pages 415-417
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, pages 418-419
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, issue 1, pages 19-21
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Published in Journal of The Washington Academy of Sciences, in 1950, in volume 40, issue 9, pages 282-285
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