@misc{indiciaebaecc4e6f5fd,
  title = {Total-field aeromagnetic map of portions of Penobscot, Piscataquis, and Aroostook counties, Maine},
  author = {K. R. Bond},
  year = {1993},
  doi = {10.3133/ofr93385b},
  url = {https://pubs.usgs.gov/publication/ofr93385B},
  note = {Source identifier: ofr93385B}
}