Genre
Electronic books
124
Directories
78
Handbooks, manuals, etc
50
Congresses
43
Bibliography
23
Guidebooks
22
Use studies
8
Databases
7
Case studies
4
Conference papers and proceedings
3
Statistics
3
Academic theses
2
Art
2
Bibliography of bibliographies
2
Miscellanea
2
Popular works
2
Archives
1
Encyclopedias
1
Forecasts
1
Indexes
1
Problems, exercises, etc
1
Public relations
1
Rules and practice
1