@misc{indiciaeba13a7fb958f,
  title = {Concentration of some platinum-group metals in coal},
  author = {R. B. Finkelman and P. J. Aruscavage},
  year = {1981},
  doi = {10.1016/0166-5162(81)90006-9},
  url = {https://pubs.usgs.gov/publication/70012081},
  note = {Source identifier: 70012081}
}