Pamphlet no. 42. Combined Operations. Training at Home Stations. WO 7857 - Engeland Voorschrift 26/G.S. Publications/926 Field Service Regulation. Operations Higher Formations. - Engeland Voorschrift, 26/Regulations/1803 Infantry Section Leading, 1938 - Engeland Voorschrift, 26/Manuals/1920 Army Air Operations Pamphlet no.1. General Principles and Organization. WO 8036 - Engeland Voorschrift 26/GS Publications/1127 Army Air Operations Pamphlet no.2. Direct Support. WO 8037 - Engeland Voorschrift 26/GS Publications/1181