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- region. United Nations. Economic Commission for Europe. Geneva. ISBN 978-92-1-117228-7. OCLC 1178639864.{{cite book}}: CS1 maint: location missing publisher...28 KB (2,415 words) - 10:25, 9 May 2024
- (2020). Pathways to Sustainable Energy (PDF). United Nations. ISBN 978-92-1-117228-7. Archived (PDF) from the original on 12 April 2021. United Nations...158 KB (14,457 words) - 21:59, 1 May 2024