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平台:
Karger Journal Archive
(Available from 1957 volume: 1 issue: 1 until 2017.)
Karger Journals
(Available from 1957 volume: 1 issue: 1 until 2023.)
ProQuest SciTech Premium Collection
(Available from 1994/01/01 volume: 40 until 2015/12/31 volume: 62 issue: 1.)