@misc{indiciae8267a13a3813,
  title = {Bedrock geologic map of the Great Barrington quadrangle, Berkshire County, Massachusetts},
  author = {Nicholas M. Ratcliffe},
  year = {1974},
  doi = {10.3133/gq1141},
  url = {https://pubs.usgs.gov/publication/gq1141},
  note = {Source identifier: gq1141}
}