Columbia subject headings:
Koblenz (Germany)--History.
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Germany--Koblenz.
Harvard subject headings:
Koblenz (Germany)--History.
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Germany--Koblenz.
Princeton subject headings:
Koblenz (Germany)--History.
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Germany (West)--Koblenz.