TY  - RPRT
TI  - An unusual occurrence of arsenic-bearing pyrite in the Upper Freeport coal bed, West-Central Pennsylvania
AU  - L.F. Ruppert
AU  - J.A. Minkin
AU  - J. J. McGee
AU  - C. B. Cecil
PY  - 2002
DO  - 10.1021/ef00032a002
UR  - https://pubs.usgs.gov/publication/70016897
ID  - 70016897
ER  -