@misc{indiciae39b0881670ba,
  title = {Aeromagnetic map of the Greenville quadrangle and part of the Sebec Lake quadrangle, Piscataquis and Somerset Counties, Maine},
  author = {R. W. Bromery and J. L. Vargo},
  year = {1963},
  doi = {10.3133/gp335},
  url = {https://pubs.usgs.gov/publication/gp335},
  note = {Source identifier: gp335}
}