@misc{indiciae468c9aeefd97,
  title = {Manganese deposits of the Black Wonder area, Santa Clara and Stanislaus Counties, California},
  author = {P.D. Trask and W. G. Pierce and S.G. Lasky},
  year = {1943},
  doi = {10.3133/ofr4346},
  url = {https://pubs.usgs.gov/publication/ofr4346},
  note = {Source identifier: ofr4346}
}