Geological Survey (U.S.). (1927). Operating regulations to govern methods of mining and safety and welfare of employees on leased lands on public domain under Mineral Leasing Acts; potash, Oct. 2, 1917 (40 Stat. 297) and Feb. 7, 1927 (44 Stat. 1057); oil shale, sodium, phosphate, Feb. 25, 1920 (40 Stat. 437); sulfur, Apr. 17, 1926 (44 Stat. 301); gold, silver, and quicksilver, June 8, 1926 (44 Stat. 710); approved June 2, 1927. U.S. GPO.
Chicago Style (17th ed.) CitationGeological Survey (U.S.). Operating Regulations to Govern Methods of Mining and Safety and Welfare of Employees on Leased Lands on Public Domain Under Mineral Leasing Acts; Potash, Oct. 2, 1917 (40 Stat. 297) and Feb. 7, 1927 (44 Stat. 1057); Oil Shale, Sodium, Phosphate, Feb. 25, 1920 (40 Stat. 437); Sulfur, Apr. 17, 1926 (44 Stat. 301); Gold, Silver, and Quicksilver, June 8, 1926 (44 Stat. 710); Approved June 2, 1927. Washington: U.S. GPO, 1927.
MLA (9th ed.) CitationGeological Survey (U.S.). Operating Regulations to Govern Methods of Mining and Safety and Welfare of Employees on Leased Lands on Public Domain Under Mineral Leasing Acts; Potash, Oct. 2, 1917 (40 Stat. 297) and Feb. 7, 1927 (44 Stat. 1057); Oil Shale, Sodium, Phosphate, Feb. 25, 1920 (40 Stat. 437); Sulfur, Apr. 17, 1926 (44 Stat. 301); Gold, Silver, and Quicksilver, June 8, 1926 (44 Stat. 710); Approved June 2, 1927. U.S. GPO, 1927.