The Russian United Social Democratic Party (ROSDP) will take part in the unification process of Russia's social democrats, Mikhail Gorbachev, the party's leader and first president of the USSR, said at the third party congress, on Friday. Mr. Gorbachev confirmed ROSDP's participation in the unification congress, which is scheduled to take place in Moscow this Saturday. Mr. Gorbachev stressed that the Russian Party of Social Democrats headed by the governor of the Samara Region, Konstantin Titov, Socialist Party of Russia, Union of Realists, and Spiritual Heritage Movement are also involved in the unification process. "According to preliminary estimates, the new party will comprise 30,000 people," Mr. Gorbachev emphasized. He added that representatives of social and social-democratic parties from a number of European countries, which are members of the Socialist Internationale, had been invited to come to the upcoming unification congress.