@misc{indiciae76ba23e36ce1,
  title = {Digitized aeromagnetic map of part of the Boston 1° x 2° quadrangle, Massachusetts, New Hampshire, Connecticut, Rhode Island, and Maine},
  author = {Robert W. Simpson and J. H. Hassemer and Jimmie R. Linton},
  year = {1980},
  doi = {10.3133/ofr80243},
  url = {https://pubs.usgs.gov/publication/ofr80243},
  note = {Source identifier: ofr80243}
}