U.S. Code
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Title 30 Mineral Lands and Mining
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CHAPTER 3—LANDS CONTAINING COAL, OIL, GAS, SALTS, ASPHALTIC MATERIALS, SODIUM, SULPHUR, AND BUILDING STONE (§§ 71—172)
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SUBCHAPTER VII—PERMITS TO PROSPECT FOR CHLORIDES, SULPHATES, CARBONATES, BORATES, SILICATES, OR NITRATES OF POTASSIUM (§ 141_to_152)
SUBCHAPTER VII—PERMITS TO PROSPECT FOR CHLORIDES, SULPHATES, CARBONATES, BORATES, SILICATES, OR NITRATES OF POTASSIUM (§ 141_to_152)