This article appeared in German in the Archiv für die Geschichte des Widerstandes und der Arbeit (AGWA), of which more can be read here.
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It discusses South African revolutionary syndicalism, with particular reference to the International Socialist League (a syndicalist political group, later merged into the Communist Party of South Africa), and the Industrial Workers of Africa (a syndicalist union amongst black Africans – and the first black African trade union in the country). The latter body later merged into the semi-syndicalist Industrial and Commercial Workers’ Union of Africa (ICU), which was a mass movement in the 1920s, not just in South Africa but in neighbouring colonies as well.
Lucien van der Walt, 2001, “Revolutionärer Syndikalismus, Rasse und Klasse in Südafrika: die ‘International Socialist League’ und die ‘Industrial Workers of Africa’ 1915 bis 1920”, Archiv für die Geschichte des Widerstandes und der Arbeit, number 16, (Germany), pp. 213-246.