@misc{indiciaea08cb4db7046,
  title = {Sequential solvent extraction for forms of antimony in five selected coals},
  author = {C. Qi and Gaisheng Liu and Y. Kong and C. L. Chou and R. Wang},
  year = {2008},
  doi = {10.1086/529155},
  url = {https://pubs.usgs.gov/publication/70031818},
  note = {Source identifier: 70031818}
}