Columbia subject headings:
Defectors--Soviet Union--Biography.
Espionage, Soviet--History--20th century.
Levchenko, Stan.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Officials and employees--Biography.
Spies--Soviet Union--Biography.
Harvard subject headings:
Defectors--Soviet Union--Biography
Espionage, Soviet--History--20th century.
Espionage, Soviet--History.
Levchenko, Stan
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Officials and employees--Biography.
Spies--Soviet Union--Biography.
Princeton subject headings:
Defectors--Soviet Union--Biography.
Espionage, Soviet--History--20th century.
Levchenko, Stan.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Officials and employees--Biography.
Spies--Soviet Union--Biography.