- Author: Cornelis de Boer
- Language: French
- Year: 1926
- Author: Cornelis De Boer
- Language: French
- Year: 1921
- Author: Cornelis De Boer, Martina G. De Boer, Jeannette M. Th. M. Van ’T Sant
- Language: French
- Year: 1931
- Author: Cornelis De Boer, Martina G. De Boer, Jeannette M. Th. M. Van ’T Sant
- Language: French
- Year: 1936