@misc{indiciae0e20e3ebe397,
  title = {Aeromagnetic map of the West Point quadrangle, Orange, Dutchess, and Putnam Counties, New York},
  author = {G. E. Andreasen},
  year = {1962},
  doi = {10.3133/gp338},
  url = {https://pubs.usgs.gov/publication/gp338},
  note = {Source identifier: gp338}
}