Columbia subject headings:
Catholic Church--Poland--History--20th century.
Church--History of doctrines--20th century.
Poland--Church history--20th century.
Harvard subject headings:
Catholic Church--Poland--History--20th century.
Church--History of doctrines--20th century
Poland--Church history--20th century
Princeton subject headings:
Catholic Church--Poland--History--20th century.
Church and state--Poland--History--20th century.
Poland--Church history.