@misc{indiciae941779d002dd,
  title = {Preliminary geologic map of the Attean quadrangle, Somerset County, Maine},
  author = {Arden Leroy Albee and Eugene L. Boudette},
  year = {1961},
  doi = {10.3133/ofr611},
  url = {https://pubs.usgs.gov/publication/ofr611},
  note = {Source identifier: ofr611}
}