@misc{indiciaef35afec33eb9,
  title = {Bedrock geology of the Fort Wilkins quadrangle, Michigan},
  author = {Henry Rowland Cornwall},
  year = {1955},
  doi = {10.3133/gq74},
  url = {https://pubs.usgs.gov/publication/gq74},
  note = {Source identifier: gq74}
}