- Author: Valentin Christian
- Language: English
- Year: 2018
- Author: Berthelin Jacques, Valentin Christian, Munch Jean Charles, Christian Valentin, Jean Charles Munch
- Language: English
- Year: 2018
- Author: Valentin Christian
- Language: English
- Year: 2018
- Author: Berthelin J., Munch Jean Charles, Valentin Christian
- Language: English
- Year: 2018