(1 concentration camp, 3 prisons)
Death camps: 1
Paldiski Bay (nuclear submarine maintenance; death by radiation poisoning)
Forced-labor concentration camps: 5
1 for women (Kharku)
Torture-facility prisons: 4
Psychiatric prisons: 1
Shifrin, A., The First Guidebook to Prisons and Concentration Camps of the Soviet Union, Bantam Books, New York, 1982.