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German Map of Danube Cities
The Ukrainian Danube Delta is so small that on a map of this scale it is not even shown.
Blue-font names of rivers have been added to the original.  The course of the Tisza from its origin in Ukraine to its being shared with Romania, reentering Ukraine, leaving Ukraine in favor of Hungary, briefly making a farewell contact with Ukraine, touching Slovakia, flowing all the way through Hungary, and ultimately joining the Danube in Serbia is readily appreciated here.
Citation pending.