@misc{indiciae52e04604737d,
  title = {Characterization and modes of occurrence of elements in feed coal and fly ash; an integrated approach},
  author = {Michael E. Brownfield},
  year = {2002},
  doi = {10.3133/fs03802},
  url = {https://pubs.usgs.gov/publication/fs03802},
  note = {Source identifier: fs03802}
}