@misc{indiciae09556a300bd2,
  title = {Contour map of the bedrock surface, Bristol Quadrangle, Connecticut},
  author = {E. H. Handman and D.B. Meade},
  year = {1975},
  doi = {10.3133/mf665a},
  url = {https://pubs.usgs.gov/publication/mf665A},
  note = {Source identifier: mf665A}
}