Columbia subject headings:
Conradi family.
Germans--Russia (Federation)--Kurli︠a︡ndskai︠a︡ gubernīi︠a︡.
Kurli︠a︡ndskai︠a︡ gubernīi︠a︡ (Russia)--Genealogy.
Soviet Union--Genealogy.
Harvard subject headings:
Conradi family.
Courland (Duchy)--Genealogy.
Germans--Latvia--Courland (Duchy)
Soviet Union--Genealogy.
Princeton subject headings: