Crane, P. c. v., Manchester, S. R., & Dilcher, D. L. (1990). A preliminary survey of fossil leaves and well-preserved reproductive structures from the Sentinel Butte Formation (Paleocene) near Almont, North Dakota. Field Museum of Natural History.
Chicago-Zitierstil (17. Ausg.)Crane, Peter ca. vor, Steven R. Manchester, und David L. Dilcher. A Preliminary Survey of Fossil Leaves and Well-preserved Reproductive Structures from the Sentinel Butte Formation (Paleocene) Near Almont, North Dakota. Chicago, Ill: Field Museum of Natural History, 1990.
MLA-Zitierstil (9. Ausg.)Crane, Peter ca. vor, et al. A Preliminary Survey of Fossil Leaves and Well-preserved Reproductive Structures from the Sentinel Butte Formation (Paleocene) Near Almont, North Dakota. Field Museum of Natural History, 1990.