Published in Proc. Acad. Nat. Sci. Philadelphia, in 1913, in volume 1913, pages 153-176
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1913, in volume 65, pages 517-579
Published in Proc. Acad. Nat. Sci. Philad., in 1913, in volume 1913, pages 506
Published in Proc. Acad. nat. Sci. Philad., in 1913, in volume 65, pages 177-188
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 225-272
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 45-60
Published in Proc. Acad. Nat. Sci. Philad, in 1913, in volume 65, pages 508-514
Published in Proceedings of the Academy of Natural Sciences of Philadelphia (Proc. Acad. Nat. Sci. Philad.), in 1913, in volume 65, pages 273-379
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 72-77
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1913, in volume 65, pages 394-492
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1913, in volume 65, pages 82-113
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 28-44
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 78-80
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 617
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 688-692
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 693-695
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 584-616
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 696-699
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 580
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 515
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 380-393
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1913, in volume 65, pages 61-65