Paleoenvironmental significance of Upper Cretaceous palynomorph assemblages in the Hell Creek Formation, Butte County, South Dakota.
Reference:
Kroeger,J.T. (1986)
Paleoenvironmental significance of Upper Cretaceous palynomorph assemblages in the Hell Creek Formation, Butte County, South Dakota. American Association of Stratigraphic Palynologists,18th Annual Meeting,Program and Abstracts
Vol. 10 P. 251- 251