Columbia subject headings:
Harvard subject headings:
Defectors--Soviet Union--Biography
Espionage, Soviet--History.
Gazur, Edward P.
Intelligence officers--Soviet Union--Biography.
Intelligence service--Soviet Union--History.
Orlov, Aleksandr, 1895-1973.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti.
Spies--Soviet Union--Biography.
United States. Federal Bureau of Investigation
Princeton subject headings:
Espionage, Soviet--History--20th century.
Intelligence officers--Soviet Union--Biography.
Intelligence service--Soviet Union--History--20th century.
Orlov, Aleksandr, 1895-1973.