Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 14-82
Created: 2010-06-08, modified: 2021-04-05
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 83
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 84-111
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 120-135
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 136-188
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 203-206
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 209-213
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 214-293
Created: 2010-02-18, modified: 2021-04-05
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 294-295
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 296-328
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 331-336
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 360-382
Created: 2013-03-02, modified: 2013-03-02
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1920, in volume 72, pages 385-402
Created: 2013-03-03, modified: 2013-03-03