Pilsbry, H. A. (1944). Molluscan Fossils from the Rio Pachitea and Vicinity in Eastern Peru. Proceedings of the Academy of Natural Sciences of Philadelphia. 96: 137-153.
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Pilsbry, H. A.
1944
Molluscan Fossils from the Rio Pachitea and Vicinity in Eastern Peru
Proceedings of the Academy of Natural Sciences of Philadelphia