@misc{indiciaec33157700d85,
  title = {Generalized geologic map of Cape Cod},
  author = {Robert N. Oldale},
  year = {1976},
  doi = {10.3133/ofr76765},
  url = {https://pubs.usgs.gov/publication/ofr76765},
  note = {Source identifier: ofr76765}
}