Published in Ohio Journal of Science, in 1919, in volume 19, pages 210-212
Created: 2017-05-20, modified: 2017-05-20
Published in Ohio Journal of Science, in 1919, in volume 19, pages 279-292
Created: 2012-06-10, modified: 2017-01-06
Published in Ohio Jour. Sci., in 1919, in volume 19, pages 355-360
Created: 2010-11-18, modified: 2017-01-06