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Subject (Genre)
- Sources191
- History50
- Periodicals32
- Chronology30
- Biography28
- Bibliography15
- Congresses15
- Electronic books13
- Quotations12
- Case studies10
- Pictorial works7
- Personal narratives6
- Registers6
- Periodicals, etc5
- Quotations, maxims, etc5
- Documentary films3
- Documentary television programs3
- Educational films3
- Legislative hearings3
- Protest literature3