Supplement no.3 to Army/Air Operations Pamphlet no.4. (Chapter 3). Carriage of Artillery. Equipment bij Air. Section 6, Q.F. 17 Ponder, Mark 1 Gun on Carriage … Supplement no.3 to Army/Air Operations Pamphlet no.4. (chapter 3). Carriage of Artillery. Equipment by air. Section 3, Q.F. 3.7 Howitzer, Mark 1 on carriages 3-7 … Supplement no.3 to Army/Air Operations Pamphlet. no.4. (Chapter 3) Carriage of Artillery. Equipment by Air. Section 5, Pack Howitzer M1A1 on carriage, M8 in Dakota … Handbook of instructions for the 8A-3N airplane / Douglas Aircraft Co., Inc. pall mall military ser. Cavalry studies : strategical and tactical / by Douglas Haig Essay on the principles and construction of military bridges / H. Douglas Observations on modern systems of fortification / H. Douglas conservation of human resources uneducated / Eli Ginzberg and Douglas W. Bray North from Malaya : adventure on five fronts / by William O. Douglas swordbearers : studies in supreme command in the First World War / Correlli Barnett Sir Douglas Haig's despatches : (December 1915-April 1919) / ed. by J.H. Boraston western front : drawings / by Muirhead Bone ; with an introduction by Sir Douglas Haig