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平台:
EBSCOhost MLA International Bibliography
(Available from 2001/03/01.)
JSTOR Arts and Sciences IX
(Available from 1936/10/01 volume: 1 issue: 1. Most recent 6 year(s) not available.)
ProQuest Agricultural & Environmental Science Database
(Available from 1994/04/01 volume: 58 issue: 1 until 2017/10/31 volume: 81 issue: 4.)
ProQuest Biological Science Database
(Available from 1994/04/01 volume: 58 issue: 1 until 2017/10/31 volume: 81 issue: 4.)
ProQuest Earth, Atmospheric & Aquatic Science Database
(Available from 1994/04/01 volume: 58 issue: 1 until 2017/10/31 volume: 81 issue: 4.)
ProQuest Political Science Database
(Available from 1994/04/01 volume: 58 issue: 1 until 2017/10/31 volume: 81 issue: 4.)
ProQuest SciTech Premium Collection
(Available from 1994/04/01 volume: 58 issue: 1 until 2017/10/31 volume: 81 issue: 4.)