@misc{indiciaedf35c38d3855,
  title = {Geologic map of the Negaunee Southwest Quadrangle, Michigan},
  author = {Lorin D. Clark},
  year = {1971},
  doi = {10.3133/ofr7169},
  url = {https://pubs.usgs.gov/publication/ofr7169},
  note = {Source identifier: ofr7169}
}