@misc{indiciaed277b084690c,
  title = {Aeromagnetic map of the Smyrna Mills quadrangle, Aroostook County, Maine},
  author = {W.J. Dempsey},
  year = {1962},
  doi = {10.3133/gp294},
  url = {https://pubs.usgs.gov/publication/gp294},
  note = {Source identifier: gp294}
}