@book{24350,
	author = {Grant, Ulysses Sherman,},
	title = {Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin.},
	publisher = {Published by the state,},
	year = {1901.},
	series = {Wisconsin. Geological and natural history survey. Bulletin},
	address = {Madison, Wis.,},
	edition = {2d ed.}
}