Genre
Congresses
62
Treaties
60
Electronic books
47
Periodicals
36
Sources
21
Bibliography
11
Statistics
8
Commercial treaties
6
Handbooks, manuals, etc
4
Registers
4
Cases
3
Catalogs
3
Statistics, Vital
3
Indexes
2
Archives
1
Census, 1961
1
Constitution
1
Exhibitions
1
Gazetteers
1
Identification
1
Methods
1