- Author: Ulf Gräwe Hans Burchard (auth.) Gerald Schernewski Jacobus Hofstede Thomas Neumann (eds.)
- Language: English
- Year: 2011
- Author: Professor Hans Burchard (auth.)
- Language: English
- Year: 2002
- Author: Ulf Gräwe Hans Burchard (auth.) Gerald Schernewski Jacobus Hofstede Thomas Neumann (eds.)
- Language: English
- Year: 2011
- Author: Professor Hans Burchard (auth.)
- Language: English
- Year: 2002
- Author: Hans Burchard
- Language: English
- Year: 2002
- Author: Hans Burchard
- Language: English
- Year: 2002