Columbia subject headings:
Harvard subject headings:
Authors, Russian--20th century--Congresses.
Repatriation--Soviet Union--History--Congresses.
Return migration--Soviet Union--History--Congresses.
Russians--Foreign countries--Congresses.
Slepukhin, I︠U︡riĭ--Congresses.
Soviet Union--Emigration and immigration--History--Congresses.
Princeton subject headings:
Authors, Russian--20th century--Congresses.
Repatriation--Soviet Union--History--Congresses.
Return migration--Soviet Union--History--Congresses.
Russians--Foreign countries--Congresses.
Slepukhin, I︠U︡riĭ--Congresses.
Soviet Union--Emigration and immigration--History--Congresses.