- Author: Geo Widengren
- Language: Spanish
- Year: 1976
- Author: Jean Bayet, José María Blázquez Martínez, Miguel Ángel Elvira Barba
- Language: Spanish
- Year: 1984
- Author: Francisco Diez De Velasco
- Language: Spanish
- Author: Editorial Siglo XXI
- Language: Spanish
- Year: 1982