@misc{indiciae8ba4fd9a1fcc,
  title = {Contour map of the bedrock surface Windsor Locks Quadrangle, Connecticut},
  author = {R. B. Ryder and E. H. Handman},
  year = {1972},
  doi = {10.3133/mf450a},
  url = {https://pubs.usgs.gov/publication/mf450A},
  note = {Source identifier: mf450A}
}