@misc{indiciae781ad28d47fd,
  title = {Bedrock geologic map of the Kenton-Perch Lake area, northern Michigan},
  author = {W.F. Cannon and J. S. Klasner},
  year = {1980},
  doi = {10.3133/i1290},
  url = {https://pubs.usgs.gov/publication/i1290},
  note = {Source identifier: i1290}
}