field survey pamphlet Machine computing / prep. under the direction of the Chief of the Imperial General Staff ; [issued by the War Office] Artillerie Training Volume VI, Survey, Pamphlet No.9, Computation, 1944. - Engeland Voorschrift 26/GS Publications/1139 Ordnance Maintenance : Gun Data Computer M1 - USA Voorschrift, Technical Manual, 9-1646
