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Subject (Genre)
- Periodicals455
- Congresses399
- Internet videos217
- Periodical204
- Atlases187
- Educational films138
- Handbooks, manuals, etc112
- Electronic books81
- Case studies75
- Examinations, questions, etc68
- Examination Questions59
- Early works to 180054
- Handbooks49
- Case Reports43
- Bibliography36
- Outlines, syllabi, etc36
- Biography25
- Collected Works22
- methods21
- Conference papers and proceedings20