Theorie Kanon Constructies / samengest bij de Artillerieschool, Fort Oostbatterij, Den Helder Gun drill for Q.(uick) F.(iring) 25-PR Mark 2. Gun on carriages 25-PR, Mark 1 and 3, 1944 Modern gun production : including the manufacture of gun carriages, recoil mechanisms, range finders, fire control apparatus / by Arthur F. Macconochie, G.W. Birdsall 152 mm haubicoarmata wz. 1937 / Ireneusz J. Wojciechowski Feldkanonen in Rohrrücklauf-Lafette mit unabhängiger oder abhängiger Visierlinie, System Ehrhardt, Modell 1910
