reorganized into Vorkutlag,Ukhtizhemlag [ru], Sevzheldorlag, Ustvymlag (Устьвымлаг) because of the sharp increase of the convicts due to the Great Terror...

Ustvymlag (Russian: Устьвымлаг) was a Gulag labor camp in the Soviet Union, Komi ASSR, with the headquarters in the village of Ust-Vym, later moved to...