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Subject (Genre)
- Periodicals47
- Electronic books12
- Documentary films8
- Nonfiction films8
- Statistics5
- Feature films4
- Periodical4
- Handbooks, manuals, etc3
- Case studies2
- Early works to 18002
- Encyclopedias2
- Newspapers2
- Sources2
- Case history1
- Congresses1
- Documentaries and Factual Films1
- Documentary television programs1
- Educational television programs1
- Film adaptations1
- History1