@misc{indiciae7f0178e2043f,
  title = {Map showing depth to bedrock, Plainfield Quadrangle, Massachusetts},
  author = {C.J. Londquist},
  year = {1975},
  doi = {10.3133/mf664a},
  url = {https://pubs.usgs.gov/publication/mf664A},
  note = {Source identifier: mf664A}
}