@misc{indiciaec41b78c9a7ff,
  title = {Geologic map of Precambrian rocks, Marenisco, Thayer, and Watersmeet 15-minute quadrangles, Gogebic and Ontonagon counties, Michigan, and Vilas County, Wisconsin},
  author = {P.K. Sims},
  year = {1990},
  doi = {10.3133/i2093},
  url = {https://pubs.usgs.gov/publication/i2093},
  note = {Source identifier: i2093}
}