PT  - JOURNAL ARTICLE
AU  - Kerr, Richard A.
TI  - How Much Coal Remains?
AID  - 10.1126/science.323.5920.1420
DP  - 2009 Mar 13
TA  - Science
PG  - 1420--1421
VI  - 323
IP  - 5920
4099  - http://science.sciencemag.org/content/323/5920/1420.short
4100  - http://science.sciencemag.org/content/323/5920/1420.full
SO  - Science2009 Mar 13; 323