Ob (river) - Wikipedia

Hell On Earth: Nazino — The Soviet Union's Cannibal Island, by A Renaissance Writer, Exploring History

Afluentes del Rio Ob/Rio Obi casi en el mar, es.wikipedia.o…

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Ob River - Wikipedia

Ob River/Rio Obi, es.wikipedia.org/wiki/R%c3%ado_Obi, inthesitymad

Melting ice may change shape of Arctic river deltas

Data: Water quality permit violations in the French Broad River basin - Carolina Public Press

File:Ob river basin.png - Wikimedia Commons