Published in Journal of the Washington Academy of Sciences, in 1912, in volume 2, pages 146-152

Created: 2017-10-18, modified: 2017-10-18

Published in Journal of The Washington Academy of Sciences, in 1912, in volume 2, issue 5, pages 118-125

Created: 2015-03-16, modified: 2015-03-16

Published in Journal of The Washington Academy of Sciences, in 1912, in volume 2, issue 9, pages 222-223

Created: 2015-03-16, modified: 2015-03-16