TY  - RPRT
TI  - Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan
AU  - W.F. Cannon
AU  - T. H. Kress
AU  - D. M. Sutphin
AU  - G. B. Morey
AU  - Joyce Meints
PY  - 1997
DO  - 10.3133/ofr97455
UR  - https://pubs.usgs.gov/publication/ofr97455
ID  - ofr97455
ER  -