"Vpered!" : 1873-1877: materialy iz arkhiva Valeriana Nikolaevicha Smirnova /
Sapir, Boris.
Dordrecht :  D. Reidel, 
1970.
Additional title page in English, text in Russian and English.
Tom 1: Ocherk istorii "Vpered" -- tom 2: Dokumenty.
Smirnov, Valerian Nikolaevich.
Socialism
Vpered.