Іска

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Іска flows into Іса , which it joins at N 53° 5′ 10″, E 25° 28′ 59″ at OSM node n274450963, and there 282 km of total upstream flows in. load it's distributaries

Іска has 2 tributaries.

• Іўянка, which joins it at N 53° 5′ 13″, E 25° 29′ 27″ at OSM node n6238202431, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 53° 3′ 45″, E 25° 31′ 57″ at OSM node n6367626730, and 801 m of total upstream flows in.
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