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By: Case, E. C. (Ermine Cowles), - Sellards, Elias Howard, - Hussakof, L. (Louis),Edition:Publication info: Washington, D.C, Carnegie Institution of Washington, 1911Volume:Series:Holding Institution: Cornell University LibrarySubjects: Batrachia, Fossil Fishes, Fossil Insects, Fossil North America Paleontology PermianBHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection