Genre
Periodicals
44
Statistics
36
Conference papers and proceedings
27
Classification
14
Congresses
14
Directories
10
Technical reports
10
Bibliographies
8
Handbooks and manuals
8
Serial publications
7
Atlases
2
Catalogs
2
Observations
2
Academic theses
1
Databases
1
Indexes
1
Personal correspondence
1
Problems and exercises
1
Records (Documents)
1
Records and correspondence
1
Registers (Lists)
1
Sources
1
Telephone directories
1
Textbooks
1
Treaties
1
Video recordings
1