26. Lt Col Commandant of Australian Corps Schools 2 August 1918, AWM25 15/1, "General Instructions for Protection from Enemy Bombing"; War Diary of Australian General Base Depot 31 May 1918, AWM25 15/1; "General Instructions for Protection from Enemy Bombing"; Commandant of Australian Corps Schools 22 July 1918, AWM25 15/10 "Enemy Aircraft - Action to be taken in Event of an Air Raid"