@misc{indiciae106bd2c7bfaf,
  title = {Bedrock geology of the Danforth quadrangle, Maine},
  author = {David M. Larrabee and Charles Winthrop Spencer},
  year = {1963},
  doi = {10.3133/gq221},
  url = {https://pubs.usgs.gov/publication/gq221},
  note = {Source identifier: gq221}
}