TY  - RPRT
TI  - Coal systems analysis: A new approach to the understanding of coal formation, coal quality and environmental considerations, and coal as a source rock for hydrocarbons
AU  - Peter D. Warwick
PY  - 2005
DO  - 10.1130/0-8137-2387-6.1
UR  - https://pubs.usgs.gov/publication/70035233
ID  - 70035233
ER  -