@misc{indiciae1e14f2c51c61,
  title = {Bedrock geology of the Bristol quadrangle, Hartford, Litchfield, and New Haven Counties, Connecticut},
  author = {Howard E. Simpson},
  year = {1990},
  doi = {10.3133/b1573},
  url = {https://pubs.usgs.gov/publication/b1573},
  note = {Source identifier: b1573}
}