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sigmund freud
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1800 - 1951
1952 - 1989
1990 - 1993
1994 - 1996
1997 - 2000
German (2009)
wilhelm reich
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1800 - 1969
1970 - 1990
1991 - 1993
1994 - 1997
1998 - 2000
German (2009)
havelock ellis
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1800 - 1901
1902 - 1906
1907 - 1908
1909 - 1977
1978 - 2000
German (2009)