Authors: F B Loomis

Published in American Journal of Science, in 1915, in volume 39, pages 555-566

Created: 2017-09-12, modified: 2017-09-12

Authors: E H Sellards

Published in American Journal of Science, in 1915, in volume 40, pages 135-138

Created: 2014-03-05, modified: 2014-03-05