@misc{indiciaeabdf07a1dd39,
  title = {Strontianite deposits near Barstow, California},
  author = {Adolph Knopf},
  year = {1918},
  doi = {10.3133/b660i},
  url = {https://pubs.usgs.gov/publication/b660I},
  note = {Source identifier: b660I}
}