TY  - RPRT
TI  - A rapid method for concentrating sedimentary organic matter for vitrinite reflectance analysis
AU  - C.E. Barker
PY  - 1982
DO  - 10.1306/212f7fef-2b24-11d7-8648000102c1865d
UR  - https://pubs.usgs.gov/publication/70011656
ID  - 70011656
ER  -