@misc{indiciae15cab40df82b,
  title = {Aeromagnetic map of Berlin and vicinity, New Hampshire},
  author = {Randolph Wilson Bromery and J.R. Kirby and J. L. Vargo},
  year = {1957},
  doi = {10.3133/gp139},
  url = {https://pubs.usgs.gov/publication/gp139},
  note = {Source identifier: gp139}
}