Columbia subject headings:
Christian union--Bibliography.
Christian union--Study and teaching.
Dissertations, Academic--Bibliography.
Ecumenical movement--Bibliography.
Ecumenical movement--Study and teaching.
Harvard subject headings:
Christian union--Bibliography.
Christian union--Study and teaching.
Dissertations, Academic--Bibliography.
Ecumenical movement--Bibliography.
Ecumenical movement--Study and teaching.
Princeton subject headings: