@misc{indiciaeda4d923d9061,
  title = {Digital bedrock geologic map of the Mount Holly and Ludlow quadrangles, Vermont, and explanation of the bedrock geology database in the Vermont Geographic Information System, 1994},
  author = {Gregory J. Walsh and Nicholas M. Ratcliffe and John B. Dudley and Thomas Merrifield},
  year = {1997},
  doi = {10.3133/ofr94229a},
  url = {https://pubs.usgs.gov/publication/ofr94229A},
  note = {Source identifier: ofr94229A}
}