@misc{indiciae234a8c3cdd7e,
  title = {Rare-earth mineral deposits of the Mountain Pass District, San Bernardino County, California, with a foreword on history of the discovery at Mountain Pass, California},
  author = {J. C. Olson and D. R. Shawe and L.C. Pray and W. N. Sharp and D. F. Hewett},
  year = {1954},
  doi = {10.3133/pp261},
  url = {https://pubs.usgs.gov/publication/pp261},
  note = {Source identifier: pp261}
}