Konferenz der Vereinten Nationen über Umwelt und Entwicklung (UNCED) in Rio de Janeiro (1992)

Conférence des Nations Unies sur l'environnement et le développement (CNUED) à Rio de Janeiro (1992)

Conferenza sull'ambiente e lo sviluppo delle Nazioni Unite (UNCED) a Rio de Janeiro (1992)

United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro (1992)