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平台:
JSTOR Arts and Sciences VII
(Available from 1959/12/01 volume: 1 issue: 1. Most recent 6 year(s) not available.)
Periodical Archive Online (HUSO)
(Available from 1959 until 1995.)
Project MUSE Archives
(Available from 1996/01/01 until 2000/05/31. Available from 2002/06/02. Most recent 1 year(s) not available.)
ProQuest SciTech Premium Collection
(Available from 1998 volume: 39 issue: 3 until 2013 volume: 54 issue: 4.)