Address of the Central Committee to the Communist League by Marx and Engels https://marxistleninists.org/M&E/1847/communist-league/1850-ad2.htm
Lenin Archive English on the October-Revolution http://ciml.250x.com/archive/5classics/english/lenin_octoberrevolution/lenin_letter_to_the_petrograd_city_conference_7_october_1917.html
On The History of the Communist League by Frederick Engels https://marxistleninists.org/M&E/1847/communist-league/1885hist.htm
The Decline of Feudalism and the Rise of the Bourgeoisie http://hiaw.org/defcon6/works/1884/decline/index.html
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The Sixth (Prague) All-Russia Conference of the R.S.D.L.P. http://www.marx2mao.com/Lenin/SARC12.html