ProQuest Agricultural & Environmental Science Database
(Available from 2008/01/01 until 2021/07/31.)
ProQuest SciTech Premium Collection
(Available from 2008/01/01 until 2021/07/31.)
ProQuest Agricultural & Environmental Science Database
(Available from 2008/01/01 until 2011/12/31.)
ProQuest SciTech Premium Collection
(Available from 2008/01/01 until 2011/12/31.)