Brink, John (Surveyor), Clason, Lewis, Hall, Benjamin F. (Surveyor) (1838). 21N 01E - Survey Map of Edwards Township, Ogemaw County [Michigan]. Department of Natural Resources. https://michiganology.org/uncategorized/IO_33f2cc3f-84c4-42ac-9ca2-b616af902ea7 (map)