Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1919, in volume 71, pages 2-15

Created: 2010-11-20, modified: 2016-02-01

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1919, in volume 71, pages 55-120

Created: 2011-06-02, modified: 2011-06-21

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1919, in volume 71, pages 121

Created: 2013-03-02, modified: 2013-03-02

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1919, in volume 71, pages 125-127

Created: 2010-02-09, modified: 2011-06-21

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1919, in volume 71, pages 206

Created: 2013-03-02, modified: 2013-03-02

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1919, in volume 71, pages 306-312

Created: 2013-03-02, modified: 2013-03-02

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1919, in volume 71, pages 317-323

Created: 2013-03-02, modified: 2013-03-02