TY  - RPRT
TI  - Differentiating recalcitrant carbon residues in spent oil shale and source rocks
AU  - Justin E. Birdwell
AU  - Tim E. Ruble
AU  - Christopher Laughrey
AU  - David Roper
AU  - Greg Walker
PY  - 2010
UR  - https://pubs.usgs.gov/publication/70156776
ID  - 70156776
ER  -