@misc{indiciae42cbeb22d8e0,
  title = {Geologic map of the Chassell quadrangle, Michigan},
  author = {W. S. White},
  year = {1956},
  doi = {10.3133/mf43},
  url = {https://pubs.usgs.gov/publication/mf43},
  note = {Source identifier: mf43}
}