Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1914, in volume 65, pages 676-687
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 1-2
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1914, in volume 66, pages 64-160
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 161-195
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 209-213
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 219-221
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1914, in volume 66, pages 229-284
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 285-293
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 342-358
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 359-366
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 367-371
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 373-413
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 413-425
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 432-436
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 556-565
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 567-578
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 579-606
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 633
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 650-652
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1914, in volume 66, pages 668