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SLEPENI (Confidential) 88-d [Daugavpils]
Geodesic – Topographic Division, Latvian army (Armijas Štāba Ģeodēzijas Topogrāfijas dala) (mapmaker/ publisher). At 1:25 000. Also shows “Augstumi metros virs juras linena” (Heights in meters above sea level).
