Carriage of artillery equipment by air : QF 25 PR. Mark 2 gun on carriage 25 PR, Mark I in Dakota aircraft Carriage of artillery equipment by air : QF 6-PR 7-CWT, MK 4 gun on carriage 6-PR, MKS 1, 1A or 2 in Dakota Aircraft machine gunners handbook : including the Vickers and Lewis automatic machine guns / J. Bostock field manual 37-mm Gun : M1916 : FM 23-75 field manual Seacoast artillery : service of the piece : 8-inch Gun, railway artillery war department technical manual 20-MM automatic gun M3 / War Department
