Columbia subject headings:
Catholic Church--Doctrines.
Church and state--Catholic Church--History--20th century.
Church and state--Poland--History--20th century.
Communism and Christianity--Catholic Church--Poland--History--20th century.
Poland--Church history--20th century.
Harvard subject headings:
Catholic Church--Doctrines.
Church and state--Catholic Church--History--20th century
Church and state--Poland--History--20th century
Communism and Christianity--Catholic Church--Poland--History--20th century.
Poland--Church history
Princeton subject headings: