TY  - RPRT
TI  - CoalVal-A coal resource valuation program
AU  - Timothy J. Rohrbacher
AU  - Gary E. McIntosh
PY  - 2010
DO  - 10.3133/ofr20091282
UR  - https://pubs.usgs.gov/publication/ofr20091282
ID  - ofr20091282
ER  -