Encyclopaedia Britannica : a new survey of universal knowledge. [electronic resource] Encyclopaedia Britannica. Gunn to Hydrox 11 / Ed. in chief Walter Yust, managing editor John V. Dodge, London editor John Armitage.. Volume 11, : Gunnery to Hydroxylamine / — Chicago ; London ; Toronto : : Encyclopaedia Britannica,, cop. 1951.. — 1000 p. : : ill., cartes. ; 28 cm. — (Encyclopedia Britannica : a new survey of universal knowledge ;) 11.