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Genre
- Congress52
- Video recordings52
- Laboratory notes45
- Indexes (reference sources)44
- Programs (documents)43
- Annotations40
- Financial records40
- Lecture notes40
- Cartographic materials37
- Electronic mail36
- Directories35
- Essays35
- Reviews (document genre)32
- Abstracts (summaries)31
- Biographies (documents)31
- Agendas (administrative records)30
- Books29
- Oral histories (document genres)29
- Instructional Film and Video28
- Plans (reports)27