@misc{indiciae1f632ae7bae9,
  title = {Geologic map of the Chatham Quadrangle, Cape Cod, Massachusetts},
  author = {Robert N. Oldale and Carl Koteff},
  year = {1967},
  doi = {10.3133/ofr67171},
  url = {https://pubs.usgs.gov/publication/ofr67171},
  note = {Source identifier: ofr67171}
}