Era
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17th century
2
1837-1901
2
1868-
2
18th century
2
1911-1949
2
1917-1921
2
1918-1945
2
1920-1929
2
1924-
2
1925-1953
2
1942 - 1945
2
1942-1949
2
1948-1960
2
1959-
2
1960-1980
2
1971-1981
2
1971-1990
2
1976
2
1976-1990
2
1980-
2
1985-
2
1985-1995
2
1986-1991
2
1989 -
2
1989-
2
Congresses --
2
Japan
2
Japanese occupation, 1942-1945
2
Juvenile literature
2
Republic, 1912-1949
2
ca. 1717-1763
2
developing countries
2
(Logic)
1
1478-1798
1
1564-1616
1
1642-1727 - Knowledge - Science - Congresses
1
16th century
1
1750 - 1918
1
1756-1791
1
1770-1831
1
1772-1823
1
1772-1834
1
1775 - 1783
1
1780-1831
1
1783 - 1789
1
1789-1900
1
1800-1837
1
1801-1917
1
1801-1917 - Sources
1
1804-1881
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