Columbia subject headings:
Nationalism--Ukraine.
Orhanizat︠s︡ii︠a︡ ukraïnsʹkykh nat︠s︡ionalistiv.
Poland--History--1918-1945.
Poland--Relations--Ukraine--History--20th century.
Ukraine--Relations--Poland--History--20th century.
Ukrainians--Poland--History--20th century.
Harvard subject headings:
Nationalism--Ukraine
Orhanizat︠s︡ii︠a︡ ukraïnsʹkykh nat︠s︡ionalistiv.
Poland--History--1918-1945
Poland--Relations--Ukraine--History--20th century.
Ukraine--Relations--Poland--History--20th century.
Ukrainians--Poland--History--20th century.
Princeton subject headings:
Assassination--Poland.
Internal security--Poland.
Orhanizat︠s︡ii︠a︡ ukraïnsʹkykh nat︠s︡ionalistiv.
Poland--Politics and government--1918-1945.
Subversive activities--Poland.
Terrorism--Poland.
Ukrainians--Poland--Politics and government--20th century.
Ukraïnsʹka viĭsʹkova orhanizat︠s︡ii︠a︡.