The law of oil and gas [electronic resource] : a treatise upon the law of oil and gas, together with the Federal Leasing Act, and the rules and regulations of the Secretary of the Interior, governing the leasing of public lands, and of restricted Indian and tribal lands, and forms of leases and other instruments in common use in connection with the exploration for, and production of, oil and gas / by Lawrence Mills, author of Oklahoma Indian land laws, formerly of the Oklahmoa City, now of the Tulsa, Oklahoma, bar ; and J.C. Willingham of the Oklahoma City, Oklahoma, bar.