Catholic Church. National Conference of Catholic Bishops. Bishops' Committee for Ecumenical and Interreligious Affairs & Wessel, J. F. (1974). Celebration of the tenth anniversary of the Second Vatican Council's Decree on ecumenism, November 21, 1964-November 21, 1974. Publications Office, United States Catholic Conference.

Catholic Church. National Conference of Catholic Bishops. Bishops' Committee for Ecumenical and Interreligious Affairs and John F. Wessel. Celebration of the Tenth Anniversary of the Second Vatican Council's Decree on Ecumenism, November 21, 1964-November 21, 1974. Washington, D.C.: Publications Office, United States Catholic Conference, 1974.

Catholic Church. National Conference of Catholic Bishops. Bishops' Committee for Ecumenical and Interreligious Affairs and John F. Wessel. Celebration of the Tenth Anniversary of the Second Vatican Council's Decree on Ecumenism, November 21, 1964-November 21, 1974. Publications Office, United States Catholic Conference, 1974.