Museum Minute: The .50 Caliber Bolt Action Rifle - Cody Firearms Museum
Winchester created the bolt action rifle to test their .50 caliber cartridge. It looks like it’s from outer space or it could be in a science fiction movie.
Winchester WWI Anti Tank Rifle, Villar Perosa for scale. : r/guns
David Marshall Williams - Overview
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Guns of the Week: September 15 – 19 - Buffalo Bill Center of the West
History of Winchester -Winchester Collector
An Impossibly Rare Look at the Winchester .50 cal Antitank Rifle -The Firearm Blog
An Impossibly Rare Look at the Winchester .50 cal Antitank Rifle -The Firearm Blog
Historical Firearms — Experimental 1918 Winchester .50 Calibre Anti-Tank
Guns of the Week: September 15 – 19 - Buffalo Bill Center of the West
Were there any bolt action rifles in the Wild West? - Quora
Iconic Arms of America: Our Country's Top 25 Best Guns of All Time from Rock Island Auction - Small Arms Review
Fifty Caliber « Daily Bulletin