Vladimir Zemlyanikin

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as Stepan Yakovlevich Shokhin (direktor shkoly)

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as Seryozha Davydov

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as Zernov

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as Nikolai

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as Kosov

as Иван Кравчук

as Vedmed

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as student at a meeting (uncredited)

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as Nikolai Schelokov

as Golyba

as 'Chap'

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as Vasya Gordiyenko

as Gleb Petrovich

as Sergei

as Dyomin

as Белов

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as Lyosha Starostin

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as физик Евгений Александрович Крымов

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