@misc{indiciae04dcb410d8d6,
  title = {Aeromagnetic map of the Maynard quadrangle, Middlesex County, Massachusetts},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1970},
  doi = {10.3133/gp705},
  url = {https://pubs.usgs.gov/publication/gp705},
  note = {Source identifier: gp705}
}