- United States--Economic conditions26
- Energy conservation--United States25
- International relations25
- United States--History--Civil War, 1861-186525
- Fishing--Maryland--Frederick County24
- Ford, Gerald R., 1913-200624
- Soviet Union--Foreign relations--United States24
- United States--Foreign relations--Soviet Union24
- Germany. Federal Chancellor23
- Iran Hostage Crisis, 1979-198123
- Carter, Rosalynn22
- Political participation--Iowa22
- Camp David Agreements (1978)21
- Politicians--United States21
- O'Neill, Tip20
- Political campaigns--United States20
- Giscard d'Estaing, Valéry, 1926-19
- Prime ministers--Great Britain19
- Democracy--United States18
- Kissinger, Henry, 1923-18
