Columbia subject headings:
Internment camps--Soviet Union--Bibliography.
Nazi concentration camps--Soviet Union--Bibliography.
Political prisoners--Soviet Union--Bibliography.
Prisons--Soviet Union--Bibliography.
Harvard subject headings:
Concentration camps--Soviet Union--Abstracts.
Prisons--Soviet Union--Abstracts.
Princeton subject headings:
Internment camps--Soviet Union--Abstracts.
Prisons--Soviet Union--Abstracts.