@misc{indiciaeb58207248618,
  title = {Map showing depth to bedrock, New Haven-Woodmont quadrangles, Connecticut},
  author = {M. H. Ginsberg},
  year = {1976},
  doi = {10.3133/mf557c},
  url = {https://pubs.usgs.gov/publication/mf557C},
  note = {Source identifier: mf557C}
}