Indian reservations. Development of oil and gas mining leases on Indian reservations. hearings before subcommittee, 69th Congress. 1st session, on S. 1722, to provide for disposition of bonuses, rentals, and royalties received under provisions of act to promote mining of coal, phosphate, oil, oil shale gas, and sodium on public domain, approved Feb. 25, 1920, from unallotted lands in Executive order Indian reservations, [and] S. 3159, to authorize oil and gas mining leases upon unallotted lands within Executive order Indian reservations, Feb. 27-Mar. 10, 1926.

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