Columbia subject headings:
Ecumenical movement--History--Sources.
Theology--History--20th century.
Harvard subject headings:
All Africa Conference of Churches.
Christian Conference of Asia.
Christian union--History--20th century--Sources.
Ecumenical movement--Congresses.
Ecumenical movement--History--Sources.
World Council of Churches
World Council of Churches. Assembly.
World Council of Churches. Central Committee.
Princeton subject headings: