Authors: United States.
- Adams, John 1735-1826 2438 downloads
- United States. War Department. General Staff - 2427 downloads
- United States. National Aeronautics and Space Administration - 2290 downloads
- United States. Congress - 2039 downloads
- Cleveland, Grover 1837-1908 2035 downloads
- Museum of History and Technology (U.S.) - 1835 downloads
- Coolidge, Calvin 1872-1933 1807 downloads
- United States. National Conservation Congress - 1667 downloads
- McKinley, William 1843-1901 1611 downloads
- Kennedy, John F. (John Fitzgerald) 1917-1963 1595 downloads
- United States. National Park Service. Division of Publications - 1571 downloads
- United States. Federal Bureau of Investigation - 1556 downloads
- United States. Department of the Army. Office of Military History - 1547 downloads
- United States. Agricultural Research Service. Human Nutrition Research Division - 1381 downloads
- United States. Constitutional Convention (1787) - 1360 downloads
- United States. Army. Signal Corps - 1356 downloads
- United States. Bureau of Animal Industry - 1264 downloads
- United States. Bureau of the Census - 1228 downloads
- United States. Council of National Defense. Highways Transport Committee - 1184 downloads
- United States. Army. Corps of Engineers. Manhattan District - 1157 downloads
- United States. Agricultural Research Service. Consumer and Food Economics Research Division - 1113 downloads
- Geological Survey (U.S.) - 1091 downloads
- United States. Congress. House. Committee on Un-American Activities - 990 downloads
- United States. Navy Department. Bureau of Ordnance - 969 downloads
- United States Food Administration - 967 downloads
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