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平台:
JSTOR Life Sciences Collection
(Available from 1987/01/01 volume: 1 issue: 1 until 2020/01/31 volume: 34 issue: 4.)
ProQuest Agricultural & Environmental Science Database
(Available from 2015/01/01. Available from 2012/04/01 until 2012/12/31.)
ProQuest SciTech Premium Collection
(Available from 2015/01/01. Available from 2012/04/01 until 2012/12/31.)