@misc{indiciae9a22e29caae6,
  title = {Contour map of the bedrock surface, Milford Quadrangle, Connecticut},
  author = {F.P. Haeni and W.E. Wilson},
  year = {1974},
  doi = {10.3133/ofr74253},
  url = {https://pubs.usgs.gov/publication/ofr74253},
  note = {Source identifier: ofr74253}
}