The story of a great discovery how Karl Marx wrote 'Capital' /
Vygodskiĭ, Vitaliĭ Solomonovich.
Salt, Christopher S. V.
Dobb, Maurice,1900-1976.
Tunbridge Wells Abacus Press
1974
Translation of 'Istoriia odnogo velikogo otkrytiia Karla Marksa'. Moscow : Mysl', 1965
Marx, Karl, 1818-1883.