Found 2 books 
[en] 42cm "Big Bertha" and German Siege Artillery of World War I Osprey Publishing
![[Osprey Campaign 198] • Maginot Line 1940](/cover/x8qZ9_yIQCVGMmWE/small/[Osprey%20Campaign%20198]%20%e2%80%a2%20Maginot%20Line%201940.jpg)
[en] [Osprey Campaign 198] • Maginot Line 1940 Osprey Publishing
Found 2 books
[en] 42cm "Big Bertha" and German Siege Artillery of World War I Osprey Publishing
[en] [Osprey Campaign 198] • Maginot Line 1940 Osprey Publishing