Obzor glavneĭshikh mestorozhdeniĭ ugleĭ gor︠i︡uchikh slan︠t︡sev S.S.S.R. S 15 tabli︠t︡samiUgolʹnyĭ geologo-razvedochnyĭ institut (Leningrad, R.S.F.S.R.)Prigorovskiĭ, M. M.Volkov, M. S.RussianBook1930Leningrad : Izdanie Geologicheskogo komiteta, 1930.Coal mines and mining—Soviet UnionSlate—Soviet UnionBook