- Author: Jesús M. Usunáriz Garayoa (editor), Edwin Williamson (editor)
- Language: Spanish, Castilian
- Year: 2014
- Author: Ignacio Arellano (editor), Christoph Strosetzki (editor), Edwin Williamson (editor)
- Language: Spanish, Castilian
- Year: 2009
- Author: Edwin Williamson
- Language: Spanish
- Year: 2014
- Author: Edwin Williamson
- Language: English
- Year: 2009
- Author: Edwin Williamson
- Language: Portuguese
- Year: 2009
- Author: Edwin Williamson
- Language: Spanish
- Year: 2013
- Author: Edwin Williamson (ed)
- Language: English
- Year: 2013
- Author: Edwin Williamson
- Language: English
- Year: 1992
- Author: Edwin Williamson
- Language: English
- Year: 1992