Weapons : an international encyclopedia from 5000 BC to 2000 AD / [by]the Diagram Group ; [editor David Harding] complete machine-gun, 1885 to the present / [written by Ian V. Hogg] ; [illustrated by John Batchelor] Pictorial history of the machine gun / F.W.A. Hobart the cassell history of warfare art of war : war and military thought / Martin van Creveld ; general ed.: John Keegan men-at-arms series Roman army from Hadrian to Constantine / text by Michael Simkins ; colour plates by Ronald Embleton history of the British Secret Service / Richard Deacon Strategy : the indirect approach / Basil Henry Liddell Hart Brassey's battles : 3,500 years of conflict, campaigns and wars from A-Z / John Laffin history of warfare / John Keegan arms and armour series Hunting weapons / by Howard L. Blackmore Dogs of war / Ernest A. Gray Secret firearms : an illustrated history of miniature and concealed handguns / John D. Walter