Rolls-Royce; Merlin Engines & Power Plants Mk. No's.22.24.T24, 1937; Merlin 33 and 38; Dart 101 in the Armstrong Whitworth Argosy; Merlin Mk 68A and 85A Power Plants; Merlin XLV preliminary instructions, 1941; Aero Engine School Instruction Course Manual; Merlin 620; Avon Aero Engines; Kestrel series XVI, 1936; and five others of Rolls-Royce interest (14)