References: UNESCO

Selcer, Perrin. The Postwar Origins of the Global Environment: How the United Nations Built Spaceship Earth. Columbia University Press, 2018.
“International Symposium to Commemorate 25 Years of the IHD,” n.d.
Council, National Research, Policy and Global Affairs, Development Affairs Security, and Cooperation Policy and Global, and Committee for Survey and Analysis of Science Advice on Sustainable Development to International Organizations. Knowledge and Diplomacy: Science Advice in the United Nations System. National Academies Press, 2003.
UNESCO. Water, People and Cooperation: 50 Years of Water Programmes for Sustainable Development at UNESCO. UNESCO Publishing, 2015. https://www.unesco.org.uk/news/water-people-and-cooperation-50-years-of-water-programmes-for-sustainable-development-at-unesco/.