@misc{indiciae7e17a97ed427,
  title = {Aeromagnetic map of the Warwick quadrangle, Orange County, New York},
  author = {John R. Henderson and Natalie S. Tyson and May Wilson},
  year = {1958},
  doi = {10.3133/gp157},
  url = {https://pubs.usgs.gov/publication/gp157},
  note = {Source identifier: gp157}
}