| Reference | {Deposit:: SEMRAD, BOB, RESIDENT MANAGER OF CULBERSON PROPERTY, PHONE}{Deposit:: CONVERSATIONS AND PERSONAL VISIT BY EVALUATOR 9/22/82.}{Deposit:: MINING ENGINEERING MAGAZINE, MAY 1981, PAGE 590}{Geology:: ELLISON, S.P., SULPHUR IN TEXAS, TEXAS BUREAU OF ECONOMIC}{Geology:: GEOLOGY, 1971.}{Ownership:: PENNZOIL COMPANY. 1984 ANNUAL REPORT. P. 16.}{Reserve-Resource:: SECURITIES AND EXCHANGE COMMISSION FORM 10-K FOR FISCAL YEAR}{Reserve-Resource:: ENDING DEC. 31, 1981; COMMISSION FILE NO. 1-5591; PENNZOIL} |