Madrid: Siglo XXI, 2017.
Categoría: BIBLIOTECA
Mike Taber, ed. Under the Socialist Banner. Resolutions of the Second International, 1889-1912.
Chicago: Haymarket Books, 2021.
A.M. Gittlitz. I Want to Believe. Posadism, UFOs, and Apocalypse Communism.
Londres: Pluto Press, 2020.