@misc{indiciae6011199c7524,
  title = {Aeromagnetic map of the Plainfield quadrangle, New London and Windham Counties, Connecticut},
  author = {G. R. Boynton and C. W. Smith},
  year = {1965},
  doi = {10.3133/gp541},
  url = {https://pubs.usgs.gov/publication/gp541},
  note = {Source identifier: gp541}
}