@misc{indiciae6c7827c3d9f6,
  title = {Aeromagnetic map of the Webster quadrangle, Worcester County, Massachusetts and Windham County, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1968},
  doi = {10.3133/gp634},
  url = {https://pubs.usgs.gov/publication/gp634},
  note = {Source identifier: gp634}
}