@misc{indiciaeec144dc266c7,
  title = {Aeromagnetic and generalized geologic map of the Bingham quadrangle, Somerset County, Maine},
  author = {R.E. Mattick},
  year = {1965},
  doi = {10.3133/gp499},
  url = {https://pubs.usgs.gov/publication/gp499},
  note = {Source identifier: gp499}
}