50k scale topographic maps produced by the Soviet Red Army during the early portion of the 20th century.Mixed01d-03-50krusRussian Military Topographic Map CollectionPublic01d-03Soviet UnionIndex Map: 50k scale; Russian Military Topographic Map CollectionWeb servicesRussiaUkraineBelarusPolandLithuaniaEstoniaLatviaFinlandAzerbaijanRomaniaUkraineKazakhstanMoldovaHungarySlovakiaIranapproximately 1850 to 1942