Columbia subject headings:
Soi︠u︡z sot︠s︡ialistov-revoli︠u︡t︠s︡ionerov maksimalistov.
Udmurtii︠a︡ (Russia)--Politics and government--20th century.
Harvard subject headings:
Soi︠u︡z sot︠s︡ialistov-revoli︠u︡t︠s︡ionerov maksimalistov--History--20th century.
Soi︠u︡z sot︠s︡ialistov-revoli︠u︡t︠s︡ionerov maksimalistov--Russia (Federation)--Udmurtii︠a︡--History--20th century.
Udmurtii︠a︡ (Russia)--Politics and government--20th century.
Princeton subject headings: