@misc{indiciaef68433995c4a,
  title = {Aeromagnetic map of part of the Shin Pond quadrangle, Penobscot County, Maine},
  author = {R. W. Bromery},
  year = {1962},
  doi = {10.3133/gp292},
  url = {https://pubs.usgs.gov/publication/gp292},
  note = {Source identifier: gp292}
}