@misc{indiciae8d5f2aa24f6e,
  title = {Aeromagnetic map of the Old Speck Mountain quadrangle, Franklin and Oxford Counties, Maine},
  author = {J. R. Henderson and C. W. Smith},
  year = {1964},
  doi = {10.3133/gp486},
  url = {https://pubs.usgs.gov/publication/gp486},
  note = {Source identifier: gp486}
}