chronicles of 55 squadron R.F.C. and R.A.F. / L. Miller Aircraft in warfare : the dawn of the fourth arm / F.W. Lanchester ; with introd. pref. by David Henderson problem of Upper Silesia / ed. by Sidney Osborne German philosophy in relation to the war / by J.H. Muirhead future of the southern slaves / by A.H.E. Taylor 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 Zeppelins and super-zeppelins / by R.P. Hearne 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 History of Serbia / Harold W.V. Temperley