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平台:
JSTOR Sustainability
ProQuest Agricultural & Environmental Science Database
(Available from 2013/01/01 volume: 9 issue: 1 until 2014/07/31 volume: 10 issue: 2.)
ProQuest SciTech Premium Collection
(Available from 2013/01/01 volume: 9 issue: 1 until 2014/07/31 volume: 10 issue: 2.)