@misc{indiciaee656b98d132e,
  title = {Aeromagnetic map of Berwick quadrangle, Maine and New Hampshire: Total intensity relative to arbitrary datum},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1956},
  doi = {10.3133/gp137},
  url = {https://pubs.usgs.gov/publication/gp137},
  note = {Source identifier: gp137}
}