Era
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1927-2006
1
1929-1968
3
1930-
1
1930-1939
2
1933-1945
2
1934-
1
1934-1996
1
1939-
2
1940-
1
1940-1949
1
1942-
2
1945-
1
1945-1989
1
1946
1
1950-
1
1950-1959
1
1951
1
1952-
1
1953
1
1953-
3
1954-
2
1954-Juvenile literature
1
1955
1
1955-
3
1955-2011
2
1960
1
1960-1969
1
1962-2006
1
1962-2009
1
1964
1
1964-
1
1965-
1
1967-
1
1968-
1
1970-1979
1
1972-
1
1973
1
1973-
1
1975-
1
1978
1
1980-1989
1
1986 --
2
1988-
1
19th century
1
19th century --
2
2000-2009
1
2008 --
1
20th century
15
20th century --
9
20thcentury --
1
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