Columbia subject headings:
Human rights workers--Russia (Federation)--Congresses.
Sakharov, Andreĭ, 1921-1989--Congresses.
Harvard subject headings:
Dissenters--Soviet Union--Congresses.
Human rights workers--Russia (Federation)--Congresses.
Human rights--Soviet Union--Congresses.
Political prisoners--Soviet Union--Congresses.
Sakharov, Andreĭ, 1921-1989--Congresses.
Princeton subject headings:
Civil rights workers--Soviet Union--Congresses.
Physicists--Soviet Union--Congresses.
Sakharov, Andreĭ, 1921-1989--Congresses.