A 1974 dissertation on various left-wing radical groups in Weimar Republic era Germany.
Issue 3 of the magazine of Solidarity (Aberdeen) with articles on Consolidated Pneumatic, the KAPD and the German revolution, housing in Aberdeen, technology and workers' control. From around 1968.
Notes by Claudio Pozzoli on Paul Mattick, council communism and in particular its differences with left communism.
Report from the Congress of the Third International in Moscow by Otto Ruhle of the Communist Workers Party of Germany (KAPD).
Extracts from the 1922 'Leading Principles' of the Communist Workers' International.
1932 statement of the Communist Workers Union of Germany (Kommunistische Arbeiter-Union Deutschlands) on its perspective and purpose.