@misc{indiciae4574e426e6c7,
  title = {Preliminary surficial geologic map of the Collinsville quadrangle, Litchfield and Hartford Counties, Connecticut},
  author = {Roger B. Colton},
  year = {1970},
  doi = {10.3133/ofr7087},
  url = {https://pubs.usgs.gov/publication/ofr7087},
  note = {Source identifier: ofr7087}
}