Burt, William Austin, 1792-1858, Houghton, Douglass, 1809-1845 (1845). 57N 33W - Survey Map of Allouez Township, Keweenaw County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_394c5910-cac3-4d22-9590-a813cf0b4525 (map)