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MLA -ийн эшлэл (9 дэх хэвлэлт)Organisation for Economic Co-operation and Development. Delineating Functional Areas in All Territories. OECD, 2020.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.