@misc{indiciaee6c53bbf8ea7,
  title = {Geology of the Old Speck Mountain quadrangle, Maine},
  author = {Daniel J. Milton},
  year = {1961},
  doi = {10.3133/ofr61105},
  url = {https://pubs.usgs.gov/publication/ofr61105},
  note = {Source identifier: ofr61105}
}