@inbook {6623,
	title = {Molluscan biostratigraphy of the Cretaceous Western Interior Basin, North America},
	booktitle = {Evolution of the Western Interior Basin. Geological Association of Canada Special Paper},
	volume = {39},
	year = {1993},
	note = {xerox},
	pages = {397-434},
	keywords = {biogeography, bivalvia, mollusca, paleontology, phelopteria, pteriidae, pterioidea, stratigraphy},
	author = {Kauffman, E. G. and Sageman, B. B. and Kirkland, J. I. and Elder, W. P. and Harries, P. J. and Villamil, T.},
	editor = {Caldwell, W. G. E. and Kauffman, E. G.}
}
