A 1933 reply by Ralph Chaplin to, seemingly, Spanish anarchist Maximiliano Olay, about the differences between the CNT and the IWW.
A look at revolutionary and anarcho-syndicalism in three countries with sizeable syndicalist organisations in the 20th century.
Spanish Marxism vs Soviet Communism: A History of the P.O.U.M. in the Spanish Civil War - Victor Alba
Spanish Marxism Versus Soviet Communism is the first historical study of the P.O.U.M. to appear in English. Drawing from his multi-volume work on the subject, which was published in Spanish and Catalan, Victor Alba has collaborated with Stephen Schwartz to produce a condensed and amplified study that is far more than a translation.
The Revolutionary Syndicalist Committees in Spain - The history of the revolutionary syndicalist tendency of the CNT (1919-1925) - Comités Syndicalistes révolutionnaires
An account of the rise and fall of the CNT’s Revolutionary Syndicalist tendency—said to reflect the “original” orientation of the CNT of 1910-1918, modeled on the CGT and the "Charter of Amiens", as opposed to the “sectarian” anarchosyndicalist “deviation” that first arose in the CNT in 1919 as a result of the post-war crisis—featuring the “Declaration of Principles” and “Manifesto” of the Revolutionary Syndicalist Committees (founded in 1922), and discussions of the debates in the CNT concerning the Russian Revolution, the Third International, the Red Trade Union International, how to respond to repression, the question of violence, and the campaign for the trade union united front.