TY  - RPRT
TI  - Mode of occurrence of chromium in four US coals
AU  - Frank E. Huggins
AU  - N. Shah
AU  - G.P. Huffman
AU  - A. Kolker
AU  - S. Crowley
AU  - C.A. Palmer
AU  - R. B. Finkelman
PY  - 2000
DO  - 10.1016/s0378-3820(99)00090-9
UR  - https://pubs.usgs.gov/publication/70022950
ID  - 70022950
ER  -