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Subject
- History241
- Health and hygiene142
- Health aspects135
- Mental health113
- Public health106
- Health resorts83
- Medical care78
- Health73
- Veterans71
- Social conditions66
- Diseases62
- Social life and customs59
- Persian Gulf War, 199152
- Politics and government52
- Psychological aspects51
- World War, 1939-194541
- Kings and rulers40
- Medicine37
- Description and travel36
- Vietnam War, 1961-197534