@misc{indiciae90730b21ff37,
  title = {Contour map of the bedrock surface, Southington Quadrangle, Connecticut},
  author = {D. L. Mazzaferro},
  year = {1975},
  doi = {10.3133/mf660a},
  url = {https://pubs.usgs.gov/publication/mf660A},
  note = {Source identifier: mf660A}
}