Print books:
Strategic Inventions of World War I (940.4 ROB)
Weapon (R 623.4 WEA)
Encyclopedia of the American Armed Forces (R 355 AXE)
World War I (940.3 BOS)
eBooks:
Journal & web articles:
"Terror Weapons: The British Experience of Gas and Its Treatment in the First World War."
"Why Chemical Weapons Have Been A Red Line Since World War I."
"A History of World War One in Ten Deadly Weapons."
Statistics:
"World War I weapons statistics" Google Image search
Primary sources: