N. A. Dobroli︠u︡bov : zhiznʹ, dei︠a︡telʹnostʹ, mirovozzrenie /
Kruzhkov, Vladimir Semenovich.
Moskva :  Nauka, 
1976.
Dobroli︠u︡bov, Nikolaĭ Aleksandrovich.
Philosophy, Russian.
Criticism