@misc{indiciae1f0705134703,
  title = {Bedrock geology of the Ahmeek quadrangle, Michigan},
  author = {Walter S. White and Henry Rowland Cornwall and Roger Warren Swanson},
  year = {1953},
  doi = {10.3133/gq27},
  url = {https://pubs.usgs.gov/publication/gq27},
  note = {Source identifier: gq27}
}