The Kriegsmarine's
Plan Z blueprint for the German naval construction program finalized in 1938,
envisaged building 4 aircraft carriers, but none were operational when war broke
out. Also work was started on 26 August 1942 on converting the Heavy cruiser Seydlitz
into an aircraft carrier.
German
Warships, 1815-1945: Major Surface Vessels.
ISBN-10: 0851775330
German
Warships, 1815-1945: U-boats and Mine Warfare Vessels.
ISBN-10: 155750301X
German warships of the Second World War.
ISBN-10: 0668040378
For a complete list of
sources 
