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- Original, first-hand account of an event or time period
- Usually written or made during or close to the event or time period
- Original, creative writing or works of art
- Factual, not interpretive
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- Report of scientific discoveries
- Results of experiments
- Results of clinical trials
- Social and political science research results
- Factual, not interpretive
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- Diaries, journals, and letters
- Newspaper and magazine articles (factual accounts)
- Government records (census, marriage, military)
- Photographs, maps, postcards, posters
- Recorded or transcribed speeches
- Interviews with participants or witnesses (e.g., The Civil Right Movement)
- Interviews with people who lived during a particular time (e.g., genocide in Rwanda)
- Songs, Plays, novels, stories
- Paintings, drawings, and sculptures
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- Published results of research studies
- Published results of scientific experiments
- Published results of clinical trials
- Proceedings of conferences and meetings
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