TY  - RPRT
TI  - Organic geochemistry - A retrospective of its first 70 years
AU  - K.A. Kvenvolden
PY  - 2006
DO  - 10.1016/j.orggeochem.2005.09.001
UR  - https://pubs.usgs.gov/publication/70030886
ID  - 70030886
ER  -