@misc{indiciae661975c3672f,
  title = {Aeromagnetic map of the Pittsfield East quadrangle, Berkshire County, Massachusetts},
  author = {Peter Popenoe and G. R. Boynton and G. L. Zandle},
  year = {1964},
  doi = {10.3133/gp456},
  url = {https://pubs.usgs.gov/publication/gp456},
  note = {Source identifier: gp456}
}