TY  - RPRT
TI  - The World Coal Quality Inventory: A status report
AU  - S.J. Tewalt
AU  - J.C. Willett
AU  - R. B. Finkelman
PY  - 2005
DO  - 10.1016/j.coal.2005.02.013
UR  - https://pubs.usgs.gov/publication/70029555
ID  - 70029555
ER  -