TY  - RPRT
TI  - Chemistry and origin of minor and trace elements in selected vitrinite concentrates from bituminous and anthracitic coals
AU  - C.A. Palmer
AU  - P.C. Lyons
PY  - 1990
DO  - 10.1016/0166-5162(90)90035-w
UR  - https://pubs.usgs.gov/publication/70015763
ID  - 70015763
ER  -