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平台:
ProQuest Agricultural & Environmental Science Database
(Available from 1996/02/01 volume: 59 issue: 2 until 1996/11/30 volume: 59 issue: 4.)
ProQuest SciTech Premium Collection
(Available from 1996/02/01 volume: 59 issue: 2 until 1996/11/30 volume: 59 issue: 4.)