TY  - RPRT
TI  - Selective preservation and origin of petroleum-forming aquatic kerogen
AU  - Patrick G. Hatcher
AU  - E.C. Spiker
AU  - N.M. Szeverenyi
AU  - G.E. Maciel
PY  - 1983
DO  - 10.1038/305498a0
UR  - https://pubs.usgs.gov/publication/70011266
ID  - 70011266
ER  -