Columbia subject headings:
Airmen--Great Britain--Biography.
Biographies.
Escaped prisoners of war--Great Britain--Biography.
Prisoner-of-war camps--Germany--20th century.
Prisoner-of-war escapes--Germany--20th century.
World War, 1914-1918--Prisoners and prisons.
Harvard subject headings:
Airmen--Great Britain--Biography.
Escaped prisoners of war--Great Britain--Biography.
Prisoner-of-war camps--Germany--20th century.
Prisoner-of-war escapes--Germany--20th century.
World War, 1914-1918--Prisoners and prisons.
Princeton subject headings:
Airmen--Great Britain--Biography.
Escaped prisoners of war--Great Britain--Biography.
Prisoner-of-war camps--Germany--20th century.
Prisoner-of-war escapes--Germany--20th century.
World War, 1914-1918--Prisoners and prisons.