@misc{indiciaec197c6339253,
  title = {Mode of occurrence of arsenic in feed coal and its derivative fly ash, Black Warrior Basin, Alabama},
  author = {R. A. Zielinski and A. L. Foster and G.P. Meeker and I. K. Brownfield},
  year = {2007},
  doi = {10.1016/j.fuel.2006.07.033},
  url = {https://pubs.usgs.gov/publication/70032828},
  note = {Source identifier: 70032828}
}