TY  - RPRT
TI  - Mercury in U.S. coal; abundance, distribution, and modes of occurrence
AU  - Susan J. Tewalt
AU  - Linda J. Bragg
AU  - Robert B. Finkelman
PY  - 2001
DO  - 10.3133/fs09501
UR  - https://pubs.usgs.gov/publication/fs09501
ID  - fs09501
ER  -