Sergey Grigoriev. Pioneer. 1951 Sergey Grigoriev. Pioneer. 1951 Related Posts:Soviet painter Sergei GrigorievYoung Pioneer organization of the USSRSoviet writer Sergey MikhalkovSoviet Sculptor Sergey MerkurovSoviet artist Sergey Vasilievich Gerasimov 1885–1964Konenkov Sergey Timofeevich