"1914 - 1918" . . "World War, 1914-1918 Aerial operations." . . "Flybevæbning" . . . . . . "The years of the sky kings" . "The years of the sky kings"@en . "The years of the sky kings. [The story of the R.A.F. during World War I. With plates, including portraits.]"@en . . . . "The Years of the Sky Kings" . . . . . . . . . . . . . . . . . "Chronicle of aerial warfare from 1914 to 1918 by a former air gunner and pilot of the R.F.C. with much space devoted to the air duels and victory scores of the aces." . "Chronicle of aerial warfare from 1914 to 1918 by a former air gunner and pilot of the R.F.C. with much space devoted to the air duels and victory scores of the aces."@en . "The Years of the Sky Kings. [On air operations in the First World War. With plates.]"@en . . . . . . "The years of he sky kings" . . "Luftkrigshistorie" . . . . "1. Verdenskrig (Esser)" . . "1. Verdenskrig (Flytyper)" . . "1. Verdenskrig (Luftoperationer)" . .