TY  - RPRT
TI  - The systematic geologic mapping program and a quadrangle-by-quadrangle analysis of time-stratigraphic relations within oil shale-bearing rocks of the Piceance Basin, western Colorado
AU  - Ronald C. Johnson
PY  - 2012
DO  - 10.3133/sir20125041
UR  - https://pubs.usgs.gov/publication/sir20125041
ID  - sir20125041
ER  -