@misc{indiciaef2bdceb2b970,
  title = {Aeromagnetic map of the Boston South quadrangle, Middlesex, Norfolk, and Suffolk Counties, Massachusetts},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/gp677},
  url = {https://pubs.usgs.gov/publication/gp677},
  note = {Source identifier: gp677}
}