Ask your sea related question: What do the Belgian cavalry, a German U-boat and the Van Deuren mortar have in common?

Vandeweyer, L. (2013). Ask your sea related question: What do the Belgian cavalry, a German U-boat and the Van Deuren mortar have in common?, in: De Grote Rede 36: The Great War and the Sea. De Grote Rede: Nieuws over onze Kust en Zee, 36: pp. 99