@misc{indiciae73fadeffd99c,
  title = {Preliminary geologic map of part of Penobscot Bay, Maine},
  author = {D. B. Stewart},
  year = {1972},
  doi = {10.3133/ofr72360},
  url = {https://pubs.usgs.gov/publication/ofr72360},
  note = {Source identifier: ofr72360}
}