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Access Year: From 1980 To 2005
Publisher: JSTOR

Access Year: From 2000 To Present
Publisher: ACM

Access Year: From 1990 To 1990
Publisher: IEL

Access Year: From 2004 To 2004
Publisher: IEL

Access Year: From 1967 To Present
Publisher: SPRINGER

Access Year: From 1853 To 2007
Publisher: JSTOR
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