TY  - RPRT
TI  - Oil and gas resource assessment areas for 1987 assessment, lower 48 states
AU  - K. L. Varnes
AU  - D. L. Dolton
AU  - Richard F. Mast
PY  - 1990
DO  - 10.3133/ofr90614
UR  - https://pubs.usgs.gov/publication/ofr90614
ID  - ofr90614
ER  -