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Subject (Genre)
- Statistics55
- Congresses49
- Handbooks, manuals, etc46
- Periodicals37
- Lectures36
- Nonfiction films34
- Feature films28
- lectures24
- Dictionaries17
- Electronic books16
- Lecture13
- Case studies10
- Handbooks and manuals10
- Problems, exercises, etc4
- Textbooks4
- methods4
- Databases3
- Educational films3
- Internet videos3
- Longitudinal studies3