@misc{indiciae332d17249ec9,
  title = {Aeromagnetic map of the Egremont quadrangle and part of the State Line quadrangle, Berkshire County, Massachusetts and Columbia County, New York},
  author = {G. R. Boynton and Peter Popenoe and G. L. Zandle},
  year = {1965},
  doi = {10.3133/gp529},
  url = {https://pubs.usgs.gov/publication/gp529},
  note = {Source identifier: gp529}
}