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Subject (Genre)
- Periodicals650
- Congresses428
- Bibliography292
- Dictionaries173
- Handbooks, manuals, etc77
- Biography58
- Directories37
- Periodical37
- Catalogs35
- Case studies31
- Indexes24
- History20
- Terminology18
- Abstracts15
- Early works to 180015
- Interviews14
- Encyclopedias13
- Conference papers and proceedings11
- Electronic books11
- Bio-bibliography10