@misc{indiciae26f07e0123ff,
  title = {Aeromagnetic map of the Monterey quadrangle, Berkshire County, Massachusetts},
  author = {G. R. Boynton and Peter Popenoe and G. L. Zandle},
  year = {1965},
  doi = {10.3133/gp531},
  url = {https://pubs.usgs.gov/publication/gp531},
  note = {Source identifier: gp531}
}