TY  - RPRT
TI  - Petrographic and Vitrinite Reflectance Analyses of a Suite of High Volatile Bituminous Coal Samples from the United States and Venezuela
AU  - Paul C. Hackley
AU  - Jonathan J. Kolak
PY  - 2008
DO  - 10.3133/ofr20081230
UR  - https://pubs.usgs.gov/publication/ofr20081230
ID  - ofr20081230
ER  -