@misc{indiciaeed094d70b1ca,
  title = {Aeromagnetic map of the Blandford quadrangle, Hampden and Hampshire Counties, Massachusetts},
  author = {G. R. Boynton and Peter Popenoe and G. L. Zandle},
  year = {1965},
  doi = {10.3133/gp528},
  url = {https://pubs.usgs.gov/publication/gp528},
  note = {Source identifier: gp528}
}