Columbia subject headings:
Köhler, Wolfgang, 1887-1967.
Psychologists--Germany--Biography.
Spies--Canary Islands--Tenerife--Biography.
Spies--Germany--Biography.
World War, 1914-1918--Secret service--Germany.
Harvard subject headings:
Köhler, Wolfgang, 1887-1967
Psychologists--Germany--Biography
Spies--Canary Islands--Tenerife--Biography.
Spies--Germany--Biography.
World War, 1914-1918--Secret service--Germany
Princeton subject headings:
Köhler, Wolfgang, 1887-1967.
Psychologists--Germany--Biography.
Spies--Canary Islands--Tenerife--Biography.
Spies--Germany--Biography.
World War, 1914-1918--Secret service--Germany.