@misc{indiciae84339a4c7257,
  title = {Reconnaissance bedrock geologic map of the Pittsfield West Quadrangle and part of the Canaan Quadrangle, Berkshire County, Massachusetts, and Columbia County, New York},
  author = {N. M. Ratcliffe},
  year = {1978},
  doi = {10.3133/mf980},
  url = {https://pubs.usgs.gov/publication/mf980},
  note = {Source identifier: mf980}
}