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Subject (Genre)
- Handbooks, manuals, etc56
- Congresses50
- Electronic books37
- Periodicals33
- Internet resources14
- Legislative hearings10
- Handbooks and manuals9
- Bibliography8
- Case studies7
- Conference papers and proceedings6
- Documentary films6
- Catalogs5
- Early works to 18005
- Problems, exercises, etc5
- Trade catalogs5
- Electronic texts4
- Software4
- Abstracts3
- Biography3
- Computer network resources3