@misc{indiciae70b8cb894d9c,
  title = {Aeromagnetic map of the Millers Falls quadrangle, Franklin County, Massachusetts},
  author = {Peter Popenoe and G. L. Zandle},
  year = {1963},
  doi = {10.3133/gp434},
  url = {https://pubs.usgs.gov/publication/gp434},
  note = {Source identifier: gp434}
}