1643188 Ivan Vinogradov (1891-1983) Russian Mathematician and Yuri Gagarin (1934-1968) Russian Cosmonaut in 1963 (photo); (add.info.: Ivan Vinogradov (1891-1983) mathematicien russe et Youri Gagarine mort en 1968 (1934-1968) cosmonaute russe qui participa au programme Vostok en 1963 --- Ivan Vinogradov (1891-1983) russian mathematician and Yuri Gagarin (1934-1968) russian cosmonaut in 1963 ); Photo В© AGIP; RESTRICTIONS MAY APPLY FOR COMMERCIAL USE - PLEASE CONTACT US; out of copyright.