@misc{indiciae56bba945f930,
  title = {Aeromagnetic map of the Springfield South quadrangle, Hampden County, Massachusetts, and Hartford and Tolland Counties, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1968},
  doi = {10.3133/gp632},
  url = {https://pubs.usgs.gov/publication/gp632},
  note = {Source identifier: gp632}
}