@misc{indiciae353e87616188,
  title = {Aeromagnetic map of the Number Four quadrangle, Herkimer and Lewis Counties, New York},
  author = {James R. Balsley and R. W. Bromery},
  year = {1965},
  doi = {10.3133/gp502},
  url = {https://pubs.usgs.gov/publication/gp502},
  note = {Source identifier: gp502}
}