Brown, A.P. & Pilsbry, H.A. (1913b) Two collections of Pleistocene fossils from the Isthmus of Panama. Proceedings of the Academy of Natural Sciences of Philadelphia, 65, 493–500.
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Brown, A. P.; Pilsbry, H. A.
1913
Two collections of Pleistocene fossils from the Isthmus of Panama
Proceedings of the Academy of Natural Sciences of Philadelphia