Genre
Periodicals
32
Conference papers and proceedings
22
Statistics
16
Congresses
12
Classification
11
Directories
10
Bibliographies
6
Handbooks and manuals
5
Serial publications
5
Technical reports
5
Atlases
3
Catalogs
2
Observations
2
Sources
2
Indexes
1
Personal correspondence
1
Problems and exercises
1
Records (Documents)
1
Records and correspondence
1
Registers (Lists)
1
Telephone directories
1
Textbooks
1
Treaties
1