United States Code, 2012 Edition, Supplement IV, January 3, 2013 to January 6, 2017, v. 5, Title 50, War and National Defense to Title 54, National Park Service and related programs
United States Code, 2012 Edition, Supplement IV, Volume 4, Title 42, The Public Health and Welfare to Title 49, Transportation, January 3, 2013 to January 6, 2017
United States Code, 2012 Edition, Supplement IV, Volume 2, Title 15, Commerce and Trade to Title 22, Foreign Relations and Intercourse, January 3, 2013 to January 6, 2017
United States Code, 2012 Edition, Supplement 3, V. 4, Title 51, National and Commercial Space Programs, to Title 54, National Park Service and Related Programs, Popular Names, Tables, and Index
United States Code, 2012 Edition, Supplement 2, V. 3, Title 43, Public Lands to Title 54, National Park Service and Related Programs, Popular Names, Tables, and Index
United States Code, 2012 Edition, Supplement 2, January 3, 2013 to January 5, 2015, V. 2, Title 21, Food and Drugs, to Title 42, The Public Health and Welfare