Columbia subject headings:
Spain--History--Civil War, 1936-1939--Aerial operations.
Spain--History--Civil War, 1936-1939--Personal narratives.
Harvard subject headings:
Spain--History--Civil War, 1936-1939--Aerial operations.
Spain--History--Civil War, 1936-1939--Personal narratives.
Princeton subject headings:
Personal narratives.
Spain--History--Civil War, 1936-1939--Aerial operations.
Spain--History--Civil War, 1936-1939--Personal narratives.