@misc{indiciae2591127980dc,
  title = {Geologic map of the Harwich quadrangle, Barnstable County, Cape Cod, Massachusetts},
  author = {Robert N. Oldale},
  year = {1969},
  doi = {10.3133/gq786},
  url = {https://pubs.usgs.gov/publication/gq786},
  note = {Source identifier: gq786}
}