@misc{indiciae09b438d349b4,
  title = {Aeromagnetic map of the Caldwell quadrangle, Essex and Morris Counties, New Jersey},
  author = {John R. Henderson and Natalie S. Tyson and May Wilson},
  year = {1958},
  doi = {10.3133/gp172},
  url = {https://pubs.usgs.gov/publication/gp172},
  note = {Source identifier: gp172}
}