@misc{indiciae3a00199f1098,
  title = {Mode of occurrence of chromium in four US coals},
  author = {Frank E. Huggins and N. Shah and G.P. Huffman and A. Kolker and S. Crowley and C.A. Palmer and R. B. Finkelman},
  year = {2000},
  doi = {10.1016/s0378-3820(99)00090-9},
  url = {https://pubs.usgs.gov/publication/70022950},
  note = {Source identifier: 70022950}
}