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1951 summer water trek in Middle Ural: Kourovskaya base Chusovaya river - Molotov
Igor Dyatlov, Anatoliy Grigoryev, Mstislav Dyatlov, Vladimir Poluyanov, Valentina Poluyanova
In 1951 Igor Dyatlov was still in school. He was taken on a hike by his older brother, who studied at the UPI, Mstislav Dyatlov.