@misc{indiciaedf4575318fe6,
  title = {Concentration and distribution of sixty-one elements in coals from DPR Korea},
  author = {Jiawen Hu and B. Zheng and R. B. Finkelman and B. Wang and M. Wang and S. Li and D. Wu},
  year = {2006},
  doi = {10.1016/j.fuel.2005.08.037},
  url = {https://pubs.usgs.gov/publication/70030339},
  note = {Source identifier: 70030339}
}