Columbia subject headings:
Harvard subject headings:
Dissenters--Soviet Union--Biography
Political refugees--Soviet Union--Biography.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti
Ushakov, Alexander A.
Princeton subject headings:
Dissenters--Soviet Union--Biography.
Political refugees--Soviet Union--Biography.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti
Ushakov, Alexander A.