@article {72411,
	title = {The Cenozoic Time Scale},
	journal = {Geological Society of America Special Paper},
	year = {1970},
	note = {North America},
	pages = {71-89},
	keywords = {Cenozoic, Dating, North America, stratigraphy},
	author = {Evernden, Jack F. and Smith-Evernden, Roberta K.}
}
