Era
1945-
30
1990
27
20th century
7
1990-
6
1981-
4
19th century
4
1945
3
1966-
3
1981
3
1981-1993
3
1999
3
Congresses
3
1945 -
2
1971-1981
2
1971-1990
2
1976-
2
1980-
2
1986-1991
2
Congresses --
2
1478-1798
1
1750 - 1918
1
1789-1900
1
1800-1837
1
1901-1936
1
1917-1928
1
1918-
1
1933-40
1
1945 -Congresses
1
1946-
1
1946-1973
1
1946-1986
1
1959-
1
1960-
1
1961-1971
1
1971 -
1
1975-
1
1976-1990
1
1985-1991
1
1985-1995
1
1986
1
1988
1
1989 - Periodicals
1
1989-
1
1990 - Periodicals
1
1993-
1
Addresses, essays, lectures
1
Asia - Periodicals
1
Commerce
1
Examination questions, etc
1
Examinations, questions
1
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