Air power : naval, military, commercial / by Claude Grahame-White and Harry Harper strategy and tactics of air fighting / by Oliver Stewart ; with introd. by W.G. Barker flugtechnische bibliothek Seefliegerei / von Hermann Uflacker Germans and Africa : their aims on the Dark Continent and how they acquired their African Colonies / Evans Lewin ; with an introduction by … Upper Silesian question and Germany's coal problem / Sidney Osborne Germany before the war / Eugène Beyens ; translated [from the French] by Paul V. Cohn Albanais et les grandes puissances / Vladan Georgevitch ; traduit de l'Allemand par Alexis Kara-Georgevitch evacuation of North Russia, 1919 : presented to Parliament by command of His Majesty Abridged treatise on the construction and manufacture of ordnance in the British service Sack of Manila united states strategic bombing survey Hoesch A.G. Dortmund, Germany Permanent organization of the Royal Air Force : note by the Secretary of State for Air on a scheme outlined by the Chief of the …