Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 39-41

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 71-73

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 73-77

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 77-78

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 107-110

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 126-133

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 133-134

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 136-137

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 137-138

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 145-150

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 150-152

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 152-162

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 172-175

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 177-182

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 200-205

Published in Journal of the Washington Academy of Sciences, in 1925, in volume 15, pages 211-213

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 235-238

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 247-263

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 264-268

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 345-346

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 381-387

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 388-392

Published in Journal of the Washington Academy of Sciences, in 1925, in volume 15, pages 395-407

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 425-426

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 438-444

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 462-463

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, pages 481-483

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 1, pages 3-9

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 3, pages 48-56

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 5, pages 101-107

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 13, pages 285-289

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 13, pages 289-299

Published in Journal of the Washington Academy of Sciences, in 1925, in volume 15, issue 17, pages 393-395

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 20, pages 457-463

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 15, issue 21, pages 472-481

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 16, issue 1, pages 14-18

Published in Journal of The Washington Academy of Sciences, in 1925, in volume 18, pages 305-306