- Author: Julio Velarde Martha Rodríguez
- Language: Spanish
- Year: 1994
- Author: Julio Velarde Martha Rodríguez
- Language: Spanish
- Year: 1992
- Author: Carlos Amat y León Julio Velarde (eds.)
- Language: Spanish
- Year: 1992
- Author: Julio Velarde, Martha Rodríguez
- Language: Spanish
- Year: 1989