Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 279-283

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 403-409

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 530-544

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 65-71

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 497-503

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 547-564

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 283-284

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 545-547

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 34-315

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 59-65

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, issue 2, pages 81-88

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 72-81

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 128-146

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 187-190

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 190-193

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 237-247

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 253-272

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 272-276

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 302-307

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 326-331

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 362-363

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 380-383

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 413-415

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 415-418

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 450-451

Published in Jour Washington Acad Sci, in 1935, in volume 25, pages 451-456

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 44-51

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 230-237

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 297-302

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 357-361

Published in Journal of The Washington Academy of Sciences, in 1935, in volume 25, pages 526-528

Published in Journal of the Washington Academy of Sciences, in 1935, in volume 25, issue 8, pages 370-377