Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 52-53

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 54-56

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 56-61

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 61-70

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 78-81

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 81-83

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 83-96

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 132-141

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 141-143

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 230-237

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 241-248

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 249-266

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 268-276

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 290-292

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 293-296

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 296-302

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 302-310

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 310-318

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 318-323

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 331-333

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 334-338

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 338-341

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 341-347

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 348-353

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 353-356

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 369-385

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 387-395

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 395-402

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 404-408

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 428-431

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 467-480

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 480-481

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 483-485

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 528-532

Published in Jour Washington Acad Sci, in 1934, in volume 24, pages 532-539

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, pages 539-541

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, issue 10, pages 432-443

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, issue 10, pages 443-447

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, issue 12, pages 541-548

Published in Journal of The Washington Academy of Sciences, in 1934, in volume 24, issue 12, pages 549-557