Delegation of the Bulgarian Peoplke's Republic visited the USSR. Secretary General of the Bulgarian Socialist Party Todor Zhivkov, sixth left, General Secretary of the the Central Committee of the Communist Party of the Soviet Union Leonid Brezhnev, seventh left, and Chairperson of the Council of Ministers of the USSR Alexei Kosygin, forth right, after "30 years of the Socialist Revolution in Bulgaria" medal ceremony.
