@misc{indiciae3bd0c7fbc4c1,
  title = {Geologic map of Precambrian rocks of parts of Iron Mountain and Escanaba 30' x 60' quadrangles, northeastern Wisconsin and adjacent Michigan},
  author = {P. K. Sims and K. J. Schulz},
  year = {1993},
  doi = {10.3133/i2356},
  url = {https://pubs.usgs.gov/publication/i2356},
  note = {Source identifier: i2356}
}