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Author/Creator
- SpringerLink (Online service)1,740
- ebrary, Inc414
- ProQuest (Firm)165
- Project Muse95
- Leal Filho, Walter76
- United Nations Environment Programme66
- Taylor & Francis53
- Edward Elgar Publishing, publisher50
- Muthu, Subramanian Senthilkannan49
- World Bank48
- United States46
- Organisation for Economic Co-operation and Development40
- United Nations Development Programme40
- Oxford University Press35
- Palgrave Connect (Online service)32
- Brandli, Luciana31
- Azul, Anabela Marisa29
- Safari Books Online (Firm)29
- Wall, Tony28
- Worldwatch Institute28