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Subject (Genre)
- Handbooks, manuals, etc786
- Atlases568
- Congresses541
- Internet videos434
- Handbooks404
- Case studies270
- Periodicals246
- Instructional films244
- Educational films232
- Classification148
- methods132
- Case Reports119
- Electronic books115
- Conference papers and proceedings114
- Periodical106
- Statistics106
- Film excerpts98
- Laboratory manuals85
- Laboratory Manuals80
- Nonfiction films78