TY  - RPRT
TI  - Bitumen-bearing deposits of the United States
AU  - Bonnie L. Crysdale
AU  - Christopher J. Schenk
PY  - 1988
DO  - 10.3133/b1784
UR  - https://pubs.usgs.gov/publication/b1784
ID  - b1784
ER  -