@misc{indiciae956a505e2cbe,
  title = {Map showing thickness of material overlying principal clay unit, Windsor Locks quadrangle, Connecticut},
  author = {W. H. Langer},
  year = {1973},
  doi = {10.3133/mf450d},
  url = {https://pubs.usgs.gov/publication/mf450D},
  note = {Source identifier: mf450D}
}