Columbia subject headings:
Forced labor--Soviet Union--History.
Glavnoe upravlenie ispravitelʹno-trudovykh lagereĭ OGPU--History.
Internment camps--Soviet Union--History.
Nazi concentration camps--Soviet Union--History.
Political prisoners--Soviet Union--Biography.
Prisons--Soviet Union--History.
Soviet Union--History--1925-1953.
Harvard subject headings:
Forced labor--Soviet Union--History
Glavnoe upravlenie ispravitelʹno-trudovykh lagereĭ OGPU--History.
Political prisoners--Soviet Union--Biography
Princeton subject headings:
Forced labor--Soviet Union--History.
Glavnoe upravlenie ispravitelʹno-trudovykh lagereĭ OGPU--History.
Political prisoners--Soviet Union--Biography.