MUTUAL NON-DISPARAGEMENT AGREEMENT THIS MUTUAL NON-DISPARAGEMENT AGREEMENT (the "Agreement") is entered into this 8th day of June, 2006 by and among (A) Rex Energy Royalties Limited Partnership, a Delaware limited partnership ("Rex Royalties"),...Mutual Non-Disparagement Agreement • June 8th, 2006 • Baseline Oil & Gas Corp. • Crude petroleum & natural gas • Pennsylvania
