- Medal Researchers NZEF Research Service NZEF Research Service covering New Zealanders who served in the New Zealand Expeditionary Forces (NZEF) during World War 1 (1914-18). . Public Record Office (PRO) The Public Record Office is the national archive of England, Wales and the United Kingdom. It brings together and preserves the records of central government and the courts of law, and makes them ...homepages.ihug.co.nz/~phil/research.htm