Columbia subject headings:
Political prisoners--Russia (Federation)--Saint Petersburg--Biography.
Harvard subject headings:
Alekseevskiĭ ravelin--History.
Petropavlovskai︠a︡ krepostʹ (Saint Petersburg, Russia)--History.
Political prisoners--Soviet Union.
Princeton subject headings:
Petropavlovskai︠a︡ krepostʹ (Saint Petersburg, Russia)--History.
Political persecution--Soviet Union.
Prisoners--Russia (Federation)--Saint Petersburg.