Powder River Basin Gas Corp. - Powder River Announces Delisting From ... CALGARY, ALBERTA--(Marketwire - June 25, 2007) - Powder River Basin Gas Corp. (OTCBB:PRVB), a revenue generating producer, acquirer and marketer of crude oil and ... http://www.marketwire.com/mw/release.do?id=745440 - 9k - Cached