@article {31414,
	title = {Foraminiferal Zonal Scheme for the Cretaceous System in the Interior Plains of Canada},
	volume = {Special Paper 18},
	year = {1978},
	note = {In: Western and Arctic biostratigraphy. ed by C. R. Steck and B. D. E. Chatterton},
	pages = {495-576},
	institution = {Geological Association of Canada},
	author = {Caldwell, W. G. E. and North, B. R. and Stelck, C. R. and Wall, J. H.}
}
