M-1 Helmet of Leonard T. Schroeder | The National WWII Museum | New Orleans
FEATURE ARTICLE] Protecting the Troops: Evolution of the German Combat Helmet - Varnum Continentals
5 Real-Life WWI Artifacts As Depicted In Netflix's "All Quiet on the Western Front" | National WWI Museum and Memorial
Military helmets - an introduction | Australian War Memorial
WWI Helmets Protect Against Shock Waves Just as Well as Modern Designs | Duke Pratt School of Engineering
Shocking” Results When WWI Helmets Were Compared to Modern Military Designs
The Brodie Helmet | National Army Museum, London
The M1 Helmet: The Soldier's helmet | Article | The United States Army
Stahlhelm - Wikipedia
John Leopold Brodie (1873-1945) - Mark 1 steel helmet
Bashford Dean and the Development of Helmets and Body Armor during World War I | Essay | The Metropolitan Museum of Art | Heilbrunn Timeline of Art History
Military helmets - an introduction | Australian War Memorial