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Edward Spears - Wikipedia
Major General Edward L. Spears - Warfare History Network
Spear - Wikipedia
BBC - The Great War Interviews, Edward Louis Spears
How The Spear Transformed Warfare - WAR HISTORY ONLINE
Military technology - Spear, Tactics, Warfare | Britannica
Five Horrific Weapons Used in World War I Trenches
Timeline: Weapons technology - New Scientist
Spear | Throwing, Hunting, Combat | Britannica