@misc{indiciae68d73d8d663a,
  title = {Aeromagnetic map of the Greenfield quadrangle, Franklin County, Massachusetts},
  author = {J. L. Meuschke and G. L. Zandle},
  year = {1963},
  doi = {10.3133/gp432},
  url = {https://pubs.usgs.gov/publication/gp432},
  note = {Source identifier: gp432}
}