@misc{indiciaed9d018c225f3,
  title = {Geology of the Bayan Obo iron-rare-earth-niobium deposits, Inner Mongolia, China},
  author = {L. J. Drew and M. Qingrun and S. Weijun},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70016851},
  note = {Source identifier: 70016851}
}