Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 24-26

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 27-32

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 57-60

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 60-62

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 80-82

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 104-117

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 138-141

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 151-153

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 157-166

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 167-83

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 187-188

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 217-220

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 228-235

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 239-241

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 242-249

Published in Jour Wash Ington Acad Sci, in 1942, in volume 32, pages 250-251

Published in Journal of the Washington Academy of Sciences, in 1942, in volume 32, pages 263-269

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 270-273

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 298-304

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 305-308

Published in Jour Wash Ington Acad Sci, in 1942, in volume 32, pages 309-311

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 318-320

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 338-341

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 343-349

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 350-352

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 359-370

Published in Journal of The Washington Academy of Sciences, in 1942, in volume 32, pages 364-370

Published in Jour Washington Acad Sci, in 1942, in volume 32, pages 370-371