@misc{indiciae6c73bbf50560,
  title = {Depth to bedrock, Hampden quadrangle, Massachusetts-Connecticut},
  author = {C.J. Londquist},
  year = {1973},
  doi = {10.3133/mf486b},
  url = {https://pubs.usgs.gov/publication/mf486B},
  note = {Source identifier: mf486B}
}