TY  - RPRT
TI  - Trace metal records of regional paleoenvironmental variability in Pennsylvanian (Upper Carboniferous) black shales
AU  - A.M. Cruse
AU  - T.W. Lyons
PY  - 2004
DO  - 10.1016/j.chemgeo.2003.12.010
UR  - https://pubs.usgs.gov/publication/70027047
ID  - 70027047
ER  -