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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 1992/01/01 volume: 61 issue: 1 until 2006/12/31 volume: 75 issue: 12.)
ProQuest SciTech Premium Collection
(Available from 1992/01/01 volume: 61 issue: 1 until 2006/12/31 volume: 75 issue: 12.)