TY  - RPRT
TI  - Marine origin of pyritic sulfur in the Lower Bakerstown coal bed, Castleman coal field, Maryland (U.S.A.)
AU  - P.C. Lyons
AU  - J. F. Whelan
AU  - F.T. Dulong
PY  - 1989
DO  - 10.1016/0166-5162(89)90056-6
UR  - https://pubs.usgs.gov/publication/70015533
ID  - 70015533
ER  -