@misc{indiciaeee672ffe321d,
  title = {Contour map of the bedrock surface, Mount Carmel Quadrangle, Connecticut},
  author = {F.P. Haeni},
  year = {1974},
  doi = {10.3133/mf540a},
  url = {https://pubs.usgs.gov/publication/mf540A},
  note = {Source identifier: mf540A}
}