Title: Chetvertyĭ (obʺedinitelʹnai︠a︡) sʺezd RSDRP
Subjects: Rossiĭskai︠a︡ sot︠s︡ial-demokraticheskai︠a︡ rabochai︠a︡ partii︠a︡. Sʺezd 1906 : Stockholm, Sweden)