23 - Ash et al. (2010). Ecosystems and Human Well-Being - A Manual for Assessment Practitioners, www.unep-wcmc.org/medialibrary/2010/10/31/90af3045/EcosystemsHumanWellbeing.pdf))
23. Ash et al.(2010).Ecosystems and Human Well-Being-A Manual for Assessment Practitioners，(www.unep-wcmc.org/medialibrary/2010/10/31/90af3045/ Ecosystems HumanWellbeing.pdf)