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平台:
ProQuest Literature Online
(Available from 1978/01/01 until 1985/12/31. Available from 1987/01/01 until 1994/12/31. Available from 1996/01/01 until 1998/12/31. Available from 2000/01/01 until 2000/01/31.)
ProQuest Literature Online
(Available from 2001/01/01 until 2013/01/31.)