@misc{indiciae6c47f578bfc1,
  title = {Aeromagnetic map of the Norwich quadrangle, New London County, Connecticut},
  author = {G. R. Boynton and C. W. Smith},
  year = {1965},
  doi = {10.3133/gp543},
  url = {https://pubs.usgs.gov/publication/gp543},
  note = {Source identifier: gp543}
}