@misc{indiciaebe5acf71b946,
  title = {Aeromagnetic map of part of the Riegelsville quadrangle, Bucks and Northampton Counties, Pennsylvania, and Hunterdon and Warren Counties, New Jersey},
  author = {Randolph Wilson Bromery and J. R. Henderson and B. L. Bennett},
  year = {1960},
  doi = {10.3133/gp236},
  url = {https://pubs.usgs.gov/publication/gp236},
  note = {Source identifier: gp236}
}