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平台:
JSTOR Arts and Sciences I
(Available from 1983/02/01 issue: 1 until 2017/10/31.)
JSTOR Arts and Sciences I
(Available from 1983/02/01 issue: 1. Most recent 4 year(s) not available.)
ProQuest Literature Online
(Available from 2002/01/01 until 2012/10/31.)
ProQuest Political Science Database
(Available from 2002/01/01 until 2012/10/31.)