References Kerr-McGee Corp. P. O. Box 2880 Dallas, TX. 75221-8339 Bill Francis (972)715-8339 * EXCO Midcontinent Division One Williams Center, Suite 2100 Tulsa, Ok. 74172-0149 Kirk Morris (918) 592-7653 * Chesapeake Operating Co. P. O. Box 18496 Oklahoma City, OK. 73154-0496 Bob Campbell (405)810-26...