@misc{indiciae8e8337373215,
  title = {Aeromagnetic map of the Cupsuptic quadrangle, Oxford and Franklin Counties, Maine},
  author = {G. R. Boynton and F. P. Gilbert},
  year = {1964},
  doi = {10.3133/gp477},
  url = {https://pubs.usgs.gov/publication/gp477},
  note = {Source identifier: gp477}
}