@misc{indiciae63e170e4b6be,
  title = {Geology of the Marquette and Sands quadrangles, Marquette County, Michigan},
  author = {J. E. Gair and R.E. Thaden},
  year = {1968},
  doi = {10.3133/pp397},
  url = {https://pubs.usgs.gov/publication/pp397},
  note = {Source identifier: pp397}
}