| http://www.w3.org/ns/prov#value | - Prospecting permits or leases may be issued under the provisions of this subchapter for deposits of potassium in public lands, also containing deposits of coal or other minerals, on condition that such other deposits be reserved to the United States for disposal under appropriate laws: Provided, That if the interests of the Government and of the lessee will be subserved thereby, potassium leases m
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