(1997). Indicators of sustainable development: : a pilot study following the methodology of the United Nations Commission on sustainable development. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleIndicators of Sustainable Development: : A Pilot Study Following the Methodology of the United Nations Commission On Sustainable Development. Luxembourg: Office for Official Publications of the European Communities, 1997.
Παραπομπή MLAIndicators of Sustainable Development: : A Pilot Study Following the Methodology of the United Nations Commission On Sustainable Development. Luxembourg: Office for Official Publications of the European Communities, 1997.
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