Columbia subject headings:
Harvard subject headings:
Chirkov, I︠U︡. I. (I︠u︡riĭ Ivanovich)
Political prisoners--Soviet Union.
Solovet͡skiĭ monastyrʹ--History.
Princeton subject headings:
Chirkov, I︠U︡. I. (I︠U︡riĭ Ivanovich), 1919-
Political prisoners--Soviet Union--Biography.