مؤلف: Wallenhorst Nathanael Wallenhorst

Wallenhorst Nathanael Wallenhorst: L’école en France et en Allemagne

Cholvy Brigitte Cholvy & Doat David Doat: L’avenir

Cholvy Brigitte Cholvy & Doat David Doat: L’avenir

Pashkevich Albina Pashkevich & Bougleux Elena Bougleux: Mines and Water

Pashkevich Albina Pashkevich & Bougleux Elena Bougleux: Mines and Water