@misc{indiciae3840ccce6174,
  title = {Preliminary total intensity aeromagnetic map of part of the Somerville quadrangle, New Jersey},
  author = {John R. Henderson},
  year = {1952},
  doi = {10.3133/ofr5273},
  url = {https://pubs.usgs.gov/publication/ofr5273},
  note = {Source identifier: ofr5273}
}