TY  - RPRT
TI  - Map of northern half of Wisconsin showing geologic data of Precambrian area
AU  - Carl E. Dutton
AU  - Reta E. Bradley
PY  - 1968
DO  - 10.3133/ofr6891
UR  - https://pubs.usgs.gov/publication/ofr6891
ID  - ofr6891
ER  -