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Subject (Genre)
- Early works to 18002,152
- Periodicals1,104
- Congresses1,028
- Academic theses814
- Electronic books719
- Biography684
- History630
- Dictionaries527
- Bibliography333
- Internet videos257
- Sources217
- Case studies167
- Terminology136
- Interviews135
- Educational films126
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- Early works95
- Encyclopedias79
- Handbooks, manuals, etc78
- Tracts (literary works)63