- Author: Ellen Wall, Barry Smit, Johanna Wandel
- Language: English
- Year: 1997
- Author: Barry Smit Grete K. Hovelsrud (auth.) Grete K. Hovelsrud Barry Smit (eds.)
- Language: English
- Year: 2010
- Author: Barry Smit Grete K. Hovelsrud (auth.) Grete K. Hovelsrud Barry Smit (eds.)
- Language: English
- Year: 2010