Authors: unit
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- Library of Congress. Copyright Office - 83 books
- Roosevelt, Theodore 1858-1919 65 books
- United States. National Park Service - 44 books
- United States. Work Projects Administration - 34 books
- Lincoln, Abraham 1809-1865 27 books
- United States. Central Intelligence Agency - 21 books
- Jefferson, Thomas 1743-1826 21 books
- United States. Warren Commission - 16 books
- Wilson, Woodrow 1856-1924 13 books
- Grant, Ulysses S. (Ulysses Simpson) 1822-1885 13 books
- United States. War Department - 11 books
- United States - 11 books
- United States. Marine Corps - 8 books
- United States. Department of the Interior - 7 books
- Madison, James 1751-1836 6 books
- Cleveland, Grover 1837-1908 6 books
- United States. National Aeronautics and Space Administration - 6 books
- Roosevelt, Franklin D. (Franklin Delano) 1882-1945 5 books
- United States. Agricultural Research Service. Human Nutrition Research Division - 5 books
- Coolidge, Calvin 1872-1933 5 books
- United States. Council of National Defense. Highways Transport Committee - 5 books
- United States. Agricultural Research Service. Consumer and Food Economics Research Division - 4 books
- McKinley, William 1843-1901 4 books
- Taft, William H. (William Howard) 1857-1930 4 books
- United States. Public Health Service - 4 books
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