@book{24376,
	author = {Winchell, N. H. and Winchell, Horace V.},
	title = {The iron ores of Minnesota :},
	publisher = {Harrison & Smith, state printers,},
	year = {1891.},
	series = {Bulletin / Geological and Natural History Survey of Minnesota ;},
	address = {Minneapolis :},
	note = {Maps and plan in pockets.}
}