@article {26848,
	title = {Potassium-argon dates of Upper Cretaceous ash falls, Alberta, Canada},
	volume = {91},
	year = {1961},
	pages = {352-359},
	publisher = {Annals of the New York Academy of Sciences},
	url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/119763176/PDFSTART},
	author = {Folinsbee, R. E. and Baadsgaard, H. and Lipson, J.}
}
