https://libcom.org/article/karl-marx-man-and-fighter-boris-nicolaievsky-and-otto-maenchen-helfen
Karl Marx: man and fighter - Boris Nicolaievsky and Otto Maenchen-Helfen | libcom.org
Part of the series of biographies of Karl Marx. 1933 biography of Karl Marx by Otto Maenchen-Helfen and Boris Ivanovich Nicolaevsky (1887-1966), who was a...
otto maenchen helfenkarl marxboris nicolaievsky