@misc{indiciae80c38df1ead7,
  title = {Materials map of the Ellington Quadrangle, Connectiuct},
  author = {R. B. Colton},
  year = {1972},
  doi = {10.3133/ofr7276},
  url = {https://pubs.usgs.gov/publication/ofr7276},
  note = {Source identifier: ofr7276}
}