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Subject
- Vietnam War, 1961-1975148
- History55
- Economic aspects28
- Social conditions20
- Indochinese War, 1946-195416
- Protest movements16
- Radicalism12
- Casualties11
- Economic conditions11
- Mothers11
- Vietnam War (1961-1975)11
- Women10
- Economic policy8
- Public opinion8
- Refugees8
- Korean War, 1950-19537
- Youth7
- Ayers, William, 1944-6
- Left-wing extremists6
- Social aspects6