Columbia subject headings:
Harvard subject headings:
Bombing, Aerial--England--Liverpool.
Docks--England--Liverpool--History--20th century.
Liverpool (England)--History.
World War, 1939-1945--Aerial operations, German.
Princeton subject headings:
Docks--England--Liverpool--History--20th century.
Liverpool (England)--History--Bombardment, 1941.
World War, 1939-1945--England--Liverpool.