@misc{indiciae1c4fec1ff4ec,
  title = {Aeromagnetic map of the Quabbin Reservoir quadrangle, Franklin, Worcester, and Hampshire Counties, Massachusetts},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1970},
  doi = {10.3133/gp698},
  url = {https://pubs.usgs.gov/publication/gp698},
  note = {Source identifier: gp698}
}