Burt, Wells, Burt, William Austin, 1792-1858, Burton, John W. (John Wear), 1915-2010 (1846). 45N 29W - Survey Map of Humboldt Township, Marquette County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_8023984f-728a-4929-9df1-efc9e523cd9a (map)