Burt, William Austin, 1792-1858, Higgins, Hiram, Hubbard, Bela, 1814-1896 (1845). 51N 44W - Survey Map of Carp Lake Township, Ontonagon County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_f255d091-0c7f-46a5-a103-3aca508d11fd (map)