TY  - RPRT
TI  - A Procedure for the supercritical fluid extraction of coal samples, with subsequent analysis of extracted hydrocarbons
AU  - Jonathan J. Kolak
PY  - 2006
DO  - 10.3133/ofr20061054
UR  - https://pubs.usgs.gov/publication/ofr20061054
ID  - ofr20061054
ER  -