Machine Gun Handbook. (Technical). Volume I, Pamphlet no. 1. Vickers.303 inch and 5 inch Machine Guns and Appurtenances. WO 888 - Engeland Voorschrift 26/Publications/3431 Instructors' Handbook on Fieldcraft and Battle Drill - Engeland Voorschrift Working Instructions. Multiphone Equipment AD 569, AD 1316, 10-Lines (Static). WO 1543 - Engeland Voorschrift