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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 2006/01/01 until 2009/12/31.)
ProQuest Earth, Atmospheric & Aquatic Science Database
(Available from 2006/01/01 until 2009/12/31.)
ProQuest SciTech Premium Collection
(Available from 2006/01/01 until 2009/12/31.)