@misc{indiciae67420dfd6935,
  title = {Preliminary bedrock geologic map of the Medfield Quadrangle, Massachusetts},
  author = {R.P. Volckmann},
  year = {1973},
  doi = {10.3133/ofr73354},
  url = {https://pubs.usgs.gov/publication/ofr73354},
  note = {Source identifier: ofr73354}
}