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- Language: Spanish
- Year: 1966

- Author: Méndel y Ruiz Honorio
- Language: Spanish
- Year: 1878

- Author: Leonidas Ponce y Cier
- Language: Spanish
- Year: 1894

- Author: Alfredo Federico Solf y Muro
- Language: Spanish
- Year: 1897

Filosofía y arte
pdf
- Author: Clemente Palma
- Language: Spanish
- Year: 1897

- Author: Moisés Sánchez
- Language: Spanish
- Year: 1899

- Author: Telésforo de Ortecho
- Language: Spanish
- Year: 1876

- Author: Alfredo Solf y Muro
- Language: Spanish
- Year: 1897