Burt, William Austin, 1792-1858, Burton, John W. (John Wear), 1915-2010 (1847). 48N 46W - Survey Map of Ironwood Township, Gogebic County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_b1d35bc0-1cba-408f-b951-121fc06225fe (map)