TY  - RPRT
TI  - Petrographic and geochemical contrasts and environmentally significant trace elements in marine-influenced coal seams, Yanzhou mining area, China
AU  - Gaisheng Liu
AU  - P. Yang
AU  - Z. Peng
AU  - C. L. Chou
PY  - 2004
DO  - 10.1016/j.jseaes.2003.07.003
UR  - https://pubs.usgs.gov/publication/70026894
ID  - 70026894
ER  -