TY  - RPRT
TI  - Depletion of Appalachian coal reserves - how soon?
AU  - R. C. Milici
PY  - 2000
DO  - 10.1016/s0166-5162(00)00013-6
UR  - https://pubs.usgs.gov/publication/70022445
ID  - 70022445
ER  -