ProQuest Agricultural & Environmental Science Database
(Available from 2016/01/01 until 2017/11/30.)
ProQuest SciTech Premium Collection
(Available from 2016/01/01 until 2017/11/30.)
ProQuest Agricultural & Environmental Science Database
(Available from 2016/01/01 until 2020/01/31.)
ProQuest SciTech Premium Collection
(Available from 2016/01/01 until 2020/01/31.)