Reports by Engel as General Secretary to General meetings of the Australian Council of Churches, 1970-75 Box 23 (MS 9073) Unit ID: 5 Date: 1970-75
Report to the Minister for Foreign Affairs by the Committee of Review into the Australian Volunteers Abroad Program, 1981 Box 18 (MS 9073) Unit ID: 12 Date: 1981
Some ecumenical institutions in UK and Europe (possible models for Australian Frontier), 1951-57 Box 11 (MS 9073) Unit ID: 40 Date: 1951-57