 | delpher.nl. De Telegraaf. 1975. Retrieved 10 April 2015. Dit is getrained zeilen (in Dutch). De Boer Maritiem. 1978. pp. 16–17. ISBN 90 228 1166 2. "Interview... 13 KB (818 words) - 15:16, 25 December 2023 |
| delpher.nl. De Telegraaf. 1975. Retrieved 10 April 2015. Dit is getrained zeilen (in Dutch). De Boer Maritiem. 1978. pp. 16–17. ISBN 90 228 1166 2. "Interview... 13 KB (818 words) - 15:16, 25 December 2023 |