TY  - RPRT
TI  - Natural seepage of crude oil into the marine environment
AU  - K.A. Kvenvolden
AU  - C.K. Cooper
PY  - 2003
DO  - 10.1007/s00367-003-0135-0
UR  - https://pubs.usgs.gov/publication/70025353
ID  - 70025353
ER  -