Columbia subject headings:
Gold mines and mining--Russia (Federation)--Kolyma.
Kolyma, Siberia (R.S.F.S.R.)
Penal colonies--Soviet Union.
Harvard subject headings:
Gold mines and mining--Siberia--Kolyma.
Kolyma (Concentration camp)
Kolyma, Siberia.
Penal colonies, Russian.
Princeton subject headings:
Gold mines and mining--Siberia--Kolyma.
Kolyma, Siberia.
Penal colonies, Russian.