@misc{indiciae7368874b7d41,
  title = {Geology and resources of titanium},
  author = {E. R. Force and M.C. Blake and B. A. Morgan and Norman Herz},
  year = {1976},
  doi = {10.3133/pp959af},
  url = {https://pubs.usgs.gov/publication/pp959AF},
  note = {Source identifier: pp959AF}
}