Lavrov : gody ėmigrat︠s︡ii: arkhivnye materialy v dvukh tomakh /
Lavrov, Peter.
Sapir, Boris.
Lopatin, German Aleksandrovich.
Dordrecht :  D. Reidel, 
1974.
Additional title page in English: Lavrov: years of emigration.
tom 1: Lavrov i Lopatin (perepiska 1870-1883) -- tom 2: Ot "Vpered!" k Gruppe Starykh Narodovolʹt︠s︡ev.
Socialists