TY  - RPRT
TI  - U.S. Geological Survey assessment model for undiscovered conventional oil, gas and NGL resources; the seventh approximation
AU  - James W. Schmoker
AU  - Timothy R. Klett
PY  - 1999
DO  - 10.3133/b2165
UR  - https://pubs.usgs.gov/publication/b2165
ID  - b2165
ER  -