Bolʹshevistskai︠a︡ Pechatʹi Rabochiĭ Klass Rossii v gody revoli︠u︡t︠s︡ionnogo podʹema 1910-1914 / 
Academy of Sciences of the Union of Soviet Socialist Republics (Moscow). - Institute of History.
Ivanov, L. M.
Moskva, 
1965.