@misc{indiciaefd6c466bfb09,
  title = {Contour map of the bedrock surface, New Haven-Woodmont quadrangles, Connecticut},
  author = {F.P. Haeni and J. E. Sanders},
  year = {1974},
  doi = {10.3133/mf557a},
  url = {https://pubs.usgs.gov/publication/mf557A},
  note = {Source identifier: mf557A}
}