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Battle of Modlin - Wikipedia
Modlin Fortress - Wikipedia
The Battle of Modlin (1939) – The Forgotten Siege during
Modlin Army - Wikipedia
116: Danzig and Army Modlin – History of the Second World War …
Battle of Modlin | Operations & Codenames of WWII
Modlin Fortress Granary – Nowy Dwór Mazowiecki, Poland
Invasion of Poland | World War II Database - WW2DB
WW2 People's War - Bellum Vobiscum -Chapter 38: Modlin - BBC
Modlin Fortress - Nowy Dwór Mazowiecki - TracesOfWar.com