@misc{indiciae7046cb821b4a,
  title = {Rare-earth metal prices in the USA ca. 1960 to 1994},
  author = {J.B. Hedrick},
  year = {1997},
  doi = {10.1016/s0925-8388(96)02532-7},
  url = {https://pubs.usgs.gov/publication/70019978},
  note = {Source identifier: 70019978}
}