(1992). Nations of the earth report: United Nations conference on environmental and development : national reports summaries. Geneva: United Nations.
Παραπομπή Chicago StyleNations of the Earth Report: United Nations Conference On Environmental and Development : National Reports Summaries. Geneva: United Nations, 1992.
Παραπομπή MLANations of the Earth Report: United Nations Conference On Environmental and Development : National Reports Summaries. Geneva: United Nations, 1992.
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