@misc{indiciae13c189b1acbf,
  title = {Bedrock geologic map of the Natick quadrangle, Middlesex and Norfolk Counties, Massachusetts},
  author = {Arthur E. Nelson},
  year = {1975},
  doi = {10.3133/gq1208},
  url = {https://pubs.usgs.gov/publication/gq1208},
  note = {Source identifier: gq1208}
}