@misc{indiciae56e3ea60274b,
  title = {Aeromagnetic map of the Howe Brook quadrangle, Aroostook County, Maine},
  author = {James R. Balsley},
  year = {1962},
  doi = {10.3133/gp290},
  url = {https://pubs.usgs.gov/publication/gp290},
  note = {Source identifier: gp290}
}