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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 2007/07/01 until 2008/06/30.)
ProQuest Biological Science Database
(Available from 2007/07/01 until 2008/06/30.)
ProQuest Earth, Atmospheric & Aquatic Science Database
(Available from 2007/07/01 until 2008/06/30.)
ProQuest SciTech Premium Collection
(Available from 2007/07/01 until 2008/06/30.)