@misc{indiciaea35c2be9c6af,
  title = {Determination of element affinities by density fractionation of bulk coal samples},
  author = {X. Querol and Z. Klika and Z. Weiss and R. B. Finkelman and A. Alastuey and R. Juan and A. Lopez-Soler and F. Plana and A. Kolker and S.R.N. Chenery},
  year = {2001},
  doi = {10.1016/s0016-2361(00)00059-4},
  url = {https://pubs.usgs.gov/publication/70024236},
  note = {Source identifier: 70024236}
}