- Author: Vladimir I. Lenin
- Language: Spanish
- Year: 1974
- Author: Karol Modzelewski, Jacek Kuron
- Language: Spanish
- Year: 1971
- Author: Nicolai I. Bujarin
- Language: Spanish
- Year: 1971
- Author: Nicolás Krassó, Ernest Mandel, Monty Johnstone
- Language: Spanish
- Year: 1972
- Author: Umberto Cerroni Lucio Magri Monty Johnstone
- Language: Spanish
- Year: 1977
- Author: Daniel Bensaid Alain Nair Rosa Luxemburg Vladimir I. Lenin Georg Lukács
- Language: Spanish
- Year: 1976
- Author: Rosa Luxemburg
- Language: Spanish
- Year: 1978
- Author: Cesare Luporini
- Language: Spanish
- Year: 1969
- Author: Paolo Santi Jacques Valler Rodolfo Banfi Hamza Alavi
- Language: Spanish
- Year: 1969
