Era
1981-1989
2
1989-
2
1924-
1
1925-
1
1928-
1
1945-
1
1945-1989
1
1949-
1
1959-2004
1
1959-2004- Encyclopedias
1
1975-
1
1979-
1
1980 --
1
1984. --
1
1988. --
1
1989-1994
1
1990 --
1
1990-
1
1992. --
1
1998-
1
20th century
1
21st century
1
Asia, Southeastern
1
Periodicals --
1
elections --
1
elections, 1988
1