Pilsbry, H. A. (1934). Pliocene fresh-water fossils of the Kettleman Hills and neighboring Californian oil fields. <em>The Nautilus.</em> 48(1): 15-17., available online athttps://www.biodiversitylibrary.org/page/8520846 page(s): 15 [details]
original descriptionPilsbry, H. A. (1934). Pliocene fresh-water fossils of the Kettleman Hills and neighboring Californian oil fields. <em>The Nautilus.</em> 48(1): 15-17., available online athttps://www.biodiversitylibrary.org/page/8520846 page(s): 15 [details]