@book{156779,
	author = {Sims, P.K.},
	title = {Archean and proterozoic geology of the Lake Superior region, U.S.A., 1993},
	publisher = {U.S. G.P.O.},
	year = {1995.},
	series = {U.S. Geological Survey professional paper},
	address = {Washington}
}