@misc{indiciaeee2c650f6e53,
  title = {International strategic mineral issues summary report– Tungsten},
  author = {Antony B. T. Werner and W. David Sinclair and Earle B. Amey},
  year = {1998},
  doi = {10.3133/cir930o},
  url = {https://pubs.usgs.gov/publication/cir930O},
  note = {Source identifier: cir930O}
}