@misc{indiciaea770374c7f1c,
  title = {Aeromagnetic map of the Mt. Holyoke quadrangle, Hampshire and Hampden Counties, Massachusetts},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/gp662},
  url = {https://pubs.usgs.gov/publication/gp662},
  note = {Source identifier: gp662}
}