@misc{indiciae6594e12bfa1c,
  title = {Minerals of Washington, D.C. and vicinity},
  author = {Lawrence R. Bernstein},
  year = {1976},
  doi = {10.3133/ofr76849},
  url = {https://pubs.usgs.gov/publication/ofr76849},
  note = {Source identifier: ofr76849}
}