@misc{indiciae94b60bd7844f,
  title = {Aeromagnetic map of part of the Traveler Mountain quadrangle, Piscataquis and Penobscot Counties, Maine},
  author = {R. W. Bromery and N.S. Tyson},
  year = {1963},
  doi = {10.3133/gp381},
  url = {https://pubs.usgs.gov/publication/gp381},
  note = {Source identifier: gp381}
}