History of the German night fighter force, 1917-1945 / Gebhard Aders ; [transl. from the German and ed. by Alex Vanags-Baginskis assisted by Brendan Gallagher] utrechtse biografieën Adrianus Kaptein (1874-1939) commandant Fort Honswijk Sojuza Sovetskich Socialističeskich Respublik 1917-1967 / [Glavnyi redaktor B. A. Vvedenski] Adrianus Kaptein (1874-1939) : commandant Fort Honswijk
