N.V. Nederlandse Dok & Scheepsbouw Mij was a Norwegian shipbuilding
company, located in Amsterdam, Ships and U-boats built by
N.V. Nederlandse Dok & Scheepsbouw Mij include.
German Warships, 1815-1945: Major Surface Vessels.
German Warships, 1815-1945: U-boats and Mine Warfare Vessels.
German warships of the Second World War.
For a complete list of sources