Bibliografía (7 obras)
The HAWK Air Defense Missile System
2022
World War II German Super-Heavy Siege Guns
2020
Railway Guns of World War I
2017
Hindenburg Line
2016
42cm 'Big Bertha' and German Siege Artillery of World War I
2014
42cm Big Bertha And German Siege Artillery Of World War I
Maginot Line 1940
2010
