@misc{indiciaec57b4d5ec13d,
  title = {Geology of the Greenville quadrangle, Maine},
  author = {Gilbert H. Espenshade and Eugene L. Boudette},
  year = {1964},
  doi = {10.3133/gq330},
  url = {https://pubs.usgs.gov/publication/gq330},
  note = {Source identifier: gq330}
}