Cobban, W. A. (1990). Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming: A multidisciplinary approach to research studies of sedimentary rocks and their constituents and the evolution of sedimentary basins, both ancient and modern.
Chicago-Zitierstil (17. Ausg.)Cobban, William A. Ammonites and Some Characteristic Bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming: A Multidisciplinary Approach to Research Studies of Sedimentary Rocks and Their Constituents and the Evolution of Sedimentary Basins, Both Ancient and Modern. Denver, Co, 1990.
MLA-Zitierstil (9. Ausg.)Cobban, William A. Ammonites and Some Characteristic Bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming: A Multidisciplinary Approach to Research Studies of Sedimentary Rocks and Their Constituents and the Evolution of Sedimentary Basins, Both Ancient and Modern. 1990.