@misc{indiciae31352394acfc,
  title = {Aeromagnetic map of part of the Churchill Lake quadrangle, Piscataquis County, Maine},
  author = {R. W. Bromery and E.F. McGowan},
  year = {1963},
  doi = {10.3133/gp375},
  url = {https://pubs.usgs.gov/publication/gp375},
  note = {Source identifier: gp375}
}