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Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Derivatives (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Asset Retirement Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - Earnings (Loss) per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Additional Financial Statement Information (Tables) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Fair Value Measurement (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Stockholders' Equity - Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Additional Financial Statement Information - Consolidated Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink