@misc{indiciae9fb98a542b45,
  title = {Geologic map of serpentinite quarry at Hunting Hill, Montgomery County, Maryland},
  author = {David M. Larrabee},
  year = {1966},
  doi = {10.3133/ofr6677},
  url = {https://pubs.usgs.gov/publication/ofr6677},
  note = {Source identifier: ofr6677}
}