Joseph Yevseyevich Barenbaum. By his 90<sup>th </sup>birthday
I. E. Barenbaum - Russian largest bibliologist and historian of the book. To its feather belongs over four hundred works. The basic directions of I. E. Barenbaum's scientific activity - history of democratic book publishing in Russia in the XIXth century, book publishing in St. Petersburg - Petrograd - Leningrad, history of the international book relations, the bibliology theory. I. E. Barenbaum took part in the Second World War, subsequently long time managed chair of the bibliography and bibliology of the Leningrad State Institute of Culture.