@misc{indiciaecf2333966593,
  title = {Geology of the Cupsuptic quadrangle, Maine},
  author = {David S. Harwood},
  year = {1966},
  doi = {10.3133/ofr6657},
  url = {https://pubs.usgs.gov/publication/ofr6657},
  note = {Source identifier: ofr6657}
}