Gordon, M., & Yochelson, E. L. (1987). Late Mississippian gastropods of the Chainman Shale, west-central Utah: Descriptions, geographic and stratigraphic distribution and illustrations of 79 species of gastropods in eight assemblages, which are equated with established ammonoid and foraminiferal zones. U.S. Government Print. Office.
Chicago-Zitierstil (17. Ausg.)Gordon, Mackenzie, und Ellis Leon Yochelson. Late Mississippian Gastropods of the Chainman Shale, West-central Utah: Descriptions, Geographic and Stratigraphic Distribution and Illustrations of 79 Species of Gastropods in Eight Assemblages, Which Are Equated with Established Ammonoid and Foraminiferal Zones. Washington: U.S. Government Print. Office, 1987.
MLA-Zitierstil (9. Ausg.)Gordon, Mackenzie, und Ellis Leon Yochelson. Late Mississippian Gastropods of the Chainman Shale, West-central Utah: Descriptions, Geographic and Stratigraphic Distribution and Illustrations of 79 Species of Gastropods in Eight Assemblages, Which Are Equated with Established Ammonoid and Foraminiferal Zones. U.S. Government Print. Office, 1987.