Röhling, H., Gast, R. E., & Gast, R. E. (1991). A lithostratigraphic subdivision of the Lower Triassic in the Northwest German Lowlands and the German sector of the North Sea, based on gamma-ray and sonic logs. Schweizerbart.
Chicago-Zitierstil (17. Ausg.)Röhling, Heinz-Gerd, Reinhart E. Gast, und Reinhard E. Gast. A Lithostratigraphic Subdivision of the Lower Triassic in the Northwest German Lowlands and the German Sector of the North Sea, Based on Gamma-ray and Sonic Logs. Stuttgart: Schweizerbart, 1991.
MLA-Zitierstil (9. Ausg.)Röhling, Heinz-Gerd, et al. A Lithostratigraphic Subdivision of the Lower Triassic in the Northwest German Lowlands and the German Sector of the North Sea, Based on Gamma-ray and Sonic Logs. Schweizerbart, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.