@misc{indiciae7ebc8ed787a3,
  title = {Bedrock geologic map of the Stockbridge quadrangle, Berkshire County, Massachusetts},
  author = {Nicholas M. Ratcliffe},
  year = {1974},
  doi = {10.3133/gq1143},
  url = {https://pubs.usgs.gov/publication/gq1143},
  note = {Source identifier: gq1143}
}