@misc{indiciae4c343c42e788,
  title = {Mode of occurrence of arsenic in four US coals},
  author = {A. Kolker and Frank E. Huggins and C.A. Palmer and N. Shah and S.S. Crowley and G.P. Huffman and R. B. Finkelman},
  year = {2000},
  doi = {10.1016/s0378-3820(99)00095-8},
  url = {https://pubs.usgs.gov/publication/70022875},
  note = {Source identifier: 70022875}
}