Drifting Cuyuna tourmaline - Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1999)
2 p.
Keywords: North Cuyuna range; Tourmaline--Minnesota; Geology; Mineralogy; Tourmaline; Geology--Minnesota; Minerals; Tourmaline formation; Cuyuna Iron Range