@misc{indiciae9f3b74d1010d,
  title = {Aeromagnetic map of the Park Ridge quadrangle, Bergen County, New Jersey and Rockland County, New York},
  author = {P. W. Philbin and J.R. Kirby},
  year = {1964},
  doi = {10.3133/gp494},
  url = {https://pubs.usgs.gov/publication/gp494},
  note = {Source identifier: gp494}
}