@misc{indiciae16f4366fc336,
  title = {Aeromagnetic map of the Gaithersburg and part of the Sandy Spring quadrangles, Montgomery County, Maryland},
  author = {Jean Blanchett and N.S. Tyson and E.F. McGowan},
  year = {1963},
  doi = {10.3133/gp395},
  url = {https://pubs.usgs.gov/publication/gp395},
  note = {Source identifier: gp395}
}