@misc{indiciaefc9999af3404,
  title = {Preliminary surficial geologic map of the Norfolk Quadrangle, Litchfield County, Connecticut},
  author = {Charles R. Warren},
  year = {1970},
  doi = {10.3133/ofr70360},
  url = {https://pubs.usgs.gov/publication/ofr70360},
  note = {Source identifier: ofr70360}
}