Verhandeling over de zee-artillerie / Howard Douglas; met aant. door H.A. Gobius treatise on naval gunnery dedicated by special permission to the lords commisioners of the admiralty / H. Douglas Douglas Aircraft Company. Technical data, Air corps standard parts book Douglas Aircraft Company. Type C-4, Fixed gun sights Douglas Aircraft Company. Technical data, Douglas standard parts Douglas Aircraft Company. Model 8A3N, Fuselage, Appedix - report no. 532, December 29 1939 Douglas Aircraft Company. Report #1060, Model 8A-3N (#535), Actual weight & balance, October 17, 1939 Behind the scenes of the museum : store, access and its implications / ed. by Robert D Smith, Eveline Sint Nicolaas and Peter Sigmond c.a.d. Inventaris van het archief van de hoofdintendant te 's-Gravenhage 1881-1941 / samengest. door P. Douglas 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
