Nomenclature 4.0
Nomenclature Primary Object Term
BookNomenclature Sub-Class
Other DocumentsNomenclature Class
Documentary ObjectsNomenclature Category
Category 08: Communication ObjectsSearch Terms
World War, 1939-1945 --Naval operations --Submarine., World War, 1939-1945 --Naval operations, German., World War, 1939-1945 --Campaigns --Atlantic Ocean.