@misc{indiciae8a125cf7ee87,
  title = {Preliminary materials map, Massachusetts portion of the Egremont quadrangle, Massachusetts-New York},
  author = {George William Holmes},
  year = {1964},
  doi = {10.3133/ofr6480},
  url = {https://pubs.usgs.gov/publication/ofr6480},
  note = {Source identifier: ofr6480}
}