Columbia subject headings:
Harvard subject headings:
Poland--Ethnic relations
Poland--Foreign relations--Ukraine
Poland--Politics and government--1918-1945
Ukraine--Foreign relations--Poland.
Ukraine--Politics and government--1917-1945.
Ukrainians--Poland--History--20th century.
Ukraïnsʹka Narodni︠a︡ Respublika (Government-in-exile)
Princeton subject headings:
Poland--Ethnic relations.
Poland--Foreign relations--Ukraine.
Poland--Politics and government--1918-1945.
Ukraine--Foreign relations--Poland.
Ukraine--Politics and government--1917-1945.
Ukrainians--Poland--History--20th century.
Ukraïnsʹka Narodni︠a︡ Respublika (Government-in-exile)