- Author: Krippner Roland, Lang Werner, Schittich Christian
- Language: German
- Year: 2012
- Author: Schittich Christian
- Language: English
- Year: 2003
- Author: Schittich Christian
- Language: English
- Year: 2012
Glas = Glass
pdf
- Author: Schittich Christian
- Language: English
- Year: 2014
Beton = Concrete
pdf
- Author: Schittich Christian
- Language: English
- Year: 2016
- Author: Schittich Christian
- Language: English
- Year: 2017
- Author: Schittich Christian.
- Language: English