TY  - RPRT
TI  - Distribution and mode of occurrence of selenium in US coals
AU  - L. Coleman
AU  - L. J. Bragg
AU  - R. B. Finkelman
PY  - 1993
DO  - 10.1007/bf00146745
UR  - https://pubs.usgs.gov/publication/70017967
ID  - 70017967
ER  -