Stegocephaloid footprint in the Middle Permian sandstone ("Grödener Sandsteine") of the western Dolomites von Leonardi, Giuseppe

Permian fusulinids of California von Thompson, M. L., Hazzard, John Charles

On the South African gorgonopsian reptiles preserved in the American Museum of Natural History von Boonstra, Lieuwe Dirk

On some South African reptiles of the suborder Therocephalia preserved in the American Museum of Natural History von Boonstra, Lieuwe Dirk

The carpus of Eryops and the structure of the primitive chiropterygium von Gregory, William K. 1876-1970

The skull elements of the Permian Tetrapoda in the American Museum of Natural History, New York von Huene, Friedrich von 1875-1969

On a pareiasaurian reptile from South Africa, Bradysaurus whaitsi von Boonstra, Lieuwe Dirk

The Permo-Carboniferous ammonoids of the Glass Mountains, west Texas, and their stratigraphical significance von Böse, Emil 1868-1927

A Monograph of the Permian Fossils of England von King, W. 1809-1886

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