@misc{indiciaeb2f74f7dc0fa,
  title = {Preliminary geologic map of the Palmer 7 1/2 minute quadrangle, Marquette County, Michigan},
  author = {Jacob E. Gair},
  year = {1968},
  doi = {10.3133/ofr68108},
  url = {https://pubs.usgs.gov/publication/ofr68108},
  note = {Source identifier: ofr68108}
}