Genre
Statistics
86
Problems and exercises
68
Periodicals
49
Conference papers and proceedings
9
Bibliographies
7
Directories
5
Congresses
4
Classification
3
Databases
3
Handbooks and manuals
3
Catalogs
2
Academic theses
1
Examinations
1
Filmographies
1
Illustrated works
1
Indexes
1
Literature
1
Maps
1
Programmed instructional materials
1
Tables (Data)
1
Technical reports
1
Telephone directories
1
Video catalogs
1