TY  - RPRT
TI  - Comparison of methods used to estimate conventional undiscovered petroleum resources: World examples
AU  - Thomas S. Ahlbrandt
AU  - T. R. Klett
PY  - 2005
DO  - 10.1007/s11053-005-8076-0
UR  - https://pubs.usgs.gov/publication/70027873
ID  - 70027873
ER  -