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Preface
(1975)
Der Begriff der Revolution
(1971)
Reason and Historical Praxis
(1978)
Autogestión y humanismo
(1973)
Self-government and Planning
(1975)
Humanism and Dialectic
(1965)
Humanismo e Dialéctica
(1976)
Umanesimo e dialettica
(1971)
Humanismo y dialéctica
(1968)