@misc{indiciae7e761c59b654,
  title = {Aeromagnetic map of the Otis quadrangle, Berkshire and Hampden Counties, Massachusetts},
  author = {G. R. Boynton and Peter Popenoe and G. L. Zandle},
  year = {1965},
  doi = {10.3133/gp532},
  url = {https://pubs.usgs.gov/publication/gp532},
  note = {Source identifier: gp532}
}