Genre
Handbooks and manuals
Laboratory manuals
26
Atlases
6
Tables (Data)
5
Dictionaries
4
Electronic books
4
Observers' manuals
4
Directories
3
Graphs
3
Style manuals
3
Technical reports
3
Bibliographies
2
Case studies
2
Conference papers and proceedings
2
Guidebooks
2
Identification
2
Maps
2
Problems and exercises
2
Biographies
1
Catalogs
1
Chronologies
1
Conversion tables
1
Early works to 1800
1
Examinations
1
Exhibition catalogs
1
Festschriften
1
Portraits
1
Trivia and miscellanea
1