Mode of access: Internet from the USGS web site. Address as of 8/17/07: http://pubs.usgs.gov/of/2006/1072/2006-1072.pdf; current access via PURL.
Title from PDF title screen (viewed on Apr. 20, 2006).
"This publication reports on the status of the current coal assessment of the Powder River Basin (PRB) in Wyoming and Montana. This slide program was presented at the Energy Information Agency's 2006 EIA Energy Outlook and Modeling Conference in Washington, DC, on March 27, 2006".