@misc{indiciae3b12a7f10949,
  title = {Geologic map of the Broad Brook quadrangle, Hartford and Tolland Counties, Connecticut},
  author = {Roger B. Colton},
  year = {1965},
  doi = {10.3133/gq434},
  url = {https://pubs.usgs.gov/publication/gq434},
  note = {Source identifier: gq434}
}