@misc{indiciae69ed32045d40,
  title = {Aeromagnetic map of Umbagog Lake and vicinity, New Hampshire: Total intensity relative to arbitrary datum},
  author = {Randolph Wilson Bromery and J.R. Kirby and J. L. Vargo},
  year = {1957},
  doi = {10.3133/gp138},
  url = {https://pubs.usgs.gov/publication/gp138},
  note = {Source identifier: gp138}
}