@misc{indiciae54b36644d2a0,
  title = {Aeromagnetic map of the Thiells quadrangle, Rockland and Orange Counties, New York},
  author = {G. E. Andreasen and J. L. Vargo},
  year = {1962},
  doi = {10.3133/gp342},
  url = {https://pubs.usgs.gov/publication/gp342},
  note = {Source identifier: gp342}
}