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== {{int:filedesc}} == {{Information |description={{en|Geographic map of the borders of {{W|Balkan Mountains}}; {{W|Sub-Balkan Valley}}s and the Pre-Balkans (in Bulgarian). Geographic limits of the map:}} *N: 43.95° N *S: 42.47° N *W: 22.20° E *E: 28.10° E Projection: Equidistant Cylindrical projection; WGS 84 datum |date=2023-04-02 |source={{own}} *Sources of data:<br/> **Topography: NASA SRTM3 (public domain);<br/> **Rivers and water bodies: Produced using Copernicus data and information fu...