@misc{indiciae01fde5199f34,
  title = {Geologic map of the Marl Mountains Quadrangle, San Bernardino County, California},
  author = {H. G. Wilshire},
  year = {1992},
  doi = {10.3133/ofr92182},
  url = {https://pubs.usgs.gov/publication/ofr92182},
  note = {Source identifier: ofr92182}
}