TY  - RPRT
TI  - The World Coal Quality Inventory: South America
AU  - Susan J. Tewalt
AU  - Linda J. Bragg
AU  - Robert B. Finkelman
PY  - 2006
DO  - 10.3133/ofr20061241
UR  - https://pubs.usgs.gov/publication/ofr20061241
ID  - ofr20061241
ER  -