Genre
Handbooks and manuals
20
Conference papers and proceedings
15
Statistics
13
Congresses
11
Technical reports
10
Bibliographies
5
Directories
4
Dictionaries
2
Exhibition catalogs
2
Illustrated works
2
Programmed instructional materials
2
Catalogs
1
Classification
1
Early works to 1800
1
Informational works
1
Literature
1
Tables (Data)
1
Trivia and miscellanea
1