@misc{indiciae96bbbd2ad4ad,
  title = {Bedrock geologic map of the Warren quadrangle, Worcester, Hampden, and Hampshire counties, south-central Massachusetts},
  author = {John S. Pomeroy},
  year = {1977},
  doi = {10.3133/gq1358},
  url = {https://pubs.usgs.gov/publication/gq1358},
  note = {Source identifier: gq1358}
}