Columbia subject headings:
Harvard subject headings:
Catholic Church--Byzantine rite, Ukrainian.
Catholic Church. Metropolitanate of Kyïv--History.
Metropolitanates--Ukraine--Kiev--History.
Ukraine--Church history.
Ukraïnsʹka katolyt︠s︡ʹka t︠s︡erkva--History.
Union of Brest
Princeton subject headings:
Catholic Church Byzantine rite--Ukraine.
Catholic Church. Metropolitanate of Kiev History.
Ukraine--Church history.