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Subjects
- World War, 1939-1945.[remove]3
- Atomic bomb.1
- Civil service.1
- Depressions -- 1929 -- United States.1
- Explosions.1
- Governors -- Philippines.1
- New Deal, 1933-1939.1
- Nuclear weapons.1
- Ordnance testing.1
- Physicists -- Michigan -- Ann Arbor.1
- Physics.1
- Political science.1
- Reconstruction (1939-1951) -- Germany.1
- Scientific equipment.1
- Spanish-American War, 1898.1
- World War, 1914-1918.1