@misc{indiciaebac8bc4c5ce2,
  title = {Aeromagnetic map of the Harrington Lake quadrangle, Piscataquis County, Maine},
  author = {J. R. Balsley and Jean Blanchett and J.R. Kirby and and others},
  year = {1957},
  doi = {10.3133/gp155},
  url = {https://pubs.usgs.gov/publication/gp155},
  note = {Source identifier: gp155}
}