Burt, William Austin, 1792-1858, Hodgson, John, Mullett, John, 1786-1862, Sibley, Sylvester (1839). 31N 02W - Survey Map of Dover Township, Otsego County [Michigan]. Department of Natural Resources. https://michigan.access.preservica.com/uncategorized/IO_2e0768db-54d1-4f07-80e8-98a14d1bd6b5 (map)