@misc{indiciaeadfd49b489c1,
  title = {Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan},
  author = {W.F. Cannon and T. H. Kress and D. M. Sutphin and G. B. Morey and Joyce Meints},
  year = {1997},
  doi = {10.3133/ofr97455},
  url = {https://pubs.usgs.gov/publication/ofr97455},
  note = {Source identifier: ofr97455}
}