Brink, John (Surveyor), Clason, Lewis, Mullett, John, 1786-1862 (1837). 20N 01E - Survey Map of Clement Township, Gladwin County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_dfefb483-d6bb-4d10-870a-a75aba505cd7 (map)