National Research Council (U.S.). Committee on the Geographic Foundational for Agenda 21., National Research Council (U.S.). Committee on Geography, National Research Council (U.S.). Mapping Science Committee, & National Research Council (U.S.). Board on Earth Sciences and Resources. (2002). Down to earth: Georgraphic information for sustainable development in Africa. National Academy Press.
Chicago-tyylinen lähdeviittausNational Research Council (U.S.). Committee on the Geographic Foundational for Agenda 21., National Research Council (U.S.). Committee on Geography, National Research Council (U.S.). Mapping Science Committee, ja National Research Council (U.S.). Board on Earth Sciences and Resources. Down to Earth: Georgraphic Information for Sustainable Development in Africa. Washington, D.C.: National Academy Press, 2002.
MLA-viiteNational Research Council (U.S.). Committee on the Geographic Foundational for Agenda 21., et al. Down to Earth: Georgraphic Information for Sustainable Development in Africa. National Academy Press, 2002.
Harvard-tyylinen lähdeviittausNational Research Council (U.S.). Committee on the Geographic Foundational for Agenda 21., National Research Council (U.S.). Committee on Geography, National Research Council (U.S.). Mapping Science Committee & National Research Council (U.S.). Board on Earth Sciences and Resources. 2002. Down to earth: Georgraphic information for sustainable development in Africa. Washington, D.C.: National Academy Press.
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