@misc{indiciae1beb29195bd7,
  title = {U.S. Geological Survey's Mineral Resources Program activities in the Upper Midwest},
  author = {Suzanne W. Nicholson},
  year = {1999},
  doi = {10.3133/70220362},
  url = {https://pubs.usgs.gov/publication/70220362},
  note = {Source identifier: 70220362}
}