@misc{indiciae6801fd1e31ae,
  title = {Digital bedrock geologic map of the Andover quadrangle, Vermont},
  author = {Nicholas M. Ratcliffe},
  year = {1996},
  doi = {10.3133/ofr9631a},
  url = {https://pubs.usgs.gov/publication/ofr9631A},
  note = {Source identifier: ofr9631A}
}