Author Богданов Л.С. Description Protection of monuments of the revolutionary movement of labor and art. - Moscow: People's Commissariat of the RSFSR; Leningrad: OGIZ, [19--]. -40 s .. -3000 copies. . I. Bogdanov, L.S. Source of the electronic copy: PB Publisher Наркомпрос РСФСР ОГИЗ