@misc{indiciaefda0983e2557,
  title = {Aeromagnetic map of Connecticut, Massachusetts, New Hampshire, Rhode Island, Vermont, and part of New York},
  author = {Isidore Zietz and Francis P. Gilbert and John R. Kirby},
  year = {1980},
  doi = {10.3133/gp928},
  url = {https://pubs.usgs.gov/publication/gp928},
  note = {Source identifier: gp928}
}