@article {26847,
	title = {Potassium-argon dates of biotites from cordilleran granites},
	volume = {72},
	year = {1961},
	pages = {689-702},
	publisher = {Geological Society of America Bulletin},
	author = {Baadsgaard, H. and Folinsbee, R. E. and Lipson, J.}
}
