@misc{indiciaed8534082d206,
  title = {Aeromagnetic map of the Wales quadrangle, Hampden and Worcester Counties, Massachusetts and Tolland County, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1968},
  doi = {10.3133/gp633},
  url = {https://pubs.usgs.gov/publication/gp633},
  note = {Source identifier: gp633}
}