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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 2013/01/01 until 2014/12/31. Available from 2016/01/01 until 2018/06/30.)
ProQuest SciTech Premium Collection
(Available from 2013/01/01 until 2014/12/31. Available from 2016/01/01 until 2018/06/30.)