- Author: Julio Valdeón Baruque
- Language: Spanish
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- Language: Spanish
- Year: 1988
- Author: James Burke y Robert Ornstein
- Language: Spanish
- Year: 2001
- Author: Richard Leakey
- Language: Spanish
- Year: 1986
- Author: Richard E. Leakey
- Language: Spanish
- Year: 1986
La Mente Humana
pdf
- Author: Konrad Lorenz et al.
- Language: Spanish
- Year: 1985
