Stephenson, L. W. (1955). Owl Creek (Upper Cretaceous) Fossils from Crowleys Ridge, Southeastern Missouri: Supplemented with descriptions and illustrations of better preserved shells from the type section of the Owl Creek formation 2,5 miles northeast of Ripley, Tippah County, Miss. U.S. Government Print. Office.
Chicago-Zitierstil (17. Ausg.)Stephenson, Lloyd William. Owl Creek (Upper Cretaceous) Fossils from Crowleys Ridge, Southeastern Missouri: Supplemented with Descriptions and Illustrations of Better Preserved Shells from the Type Section of the Owl Creek Formation 2,5 Miles Northeast of Ripley, Tippah County, Miss. Washington, DC: U.S. Government Print. Office, 1955.
MLA-Zitierstil (9. Ausg.)Stephenson, Lloyd William. Owl Creek (Upper Cretaceous) Fossils from Crowleys Ridge, Southeastern Missouri: Supplemented with Descriptions and Illustrations of Better Preserved Shells from the Type Section of the Owl Creek Formation 2,5 Miles Northeast of Ripley, Tippah County, Miss. U.S. Government Print. Office, 1955.