TY  - RPRT
TI  - Statistics of petroleum exploration in the world outside the United States and Canada through 2001
AU  - Emil D. Attanasi
AU  - Philip A. Freeman
AU  - Jennifer A. Glovier
PY  - 2007
DO  - 10.3133/cir1288
UR  - https://pubs.usgs.gov/publication/cir1288
ID  - cir1288
ER  -