@misc{indiciae615600df3a8d,
  title = {Preliminary geologic map of parts of Bristol quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut, with preliminary engineering geologic interpretations},
  author = {H.L. Simpson},
  year = {1974},
  doi = {10.3133/ofr7472},
  url = {https://pubs.usgs.gov/publication/ofr7472},
  note = {Source identifier: ofr7472}
}