No doubt about it, Elmer Keith was the greatest advocate of big bore rifles in the last century. Askins, O'Connor, Page,
and others wrote a few articles on double rifles but it was Elmer who wrote of large caliber double rifles at length and detail.
Here are a few of them.
Big Game Rifles and Cartridges, Ch 4 on double rifles. Samworth,
British Double and Single Rifles. Source and date unknown
Rifles With Stopping Power. Guns and Ammo.
The Deadly Dependable Double. Gun Digest, 1967
Put Your Double Rifle Into Action. Guns and
Ammo. November, 1964
Keith on Big Bullets. Source and date unknown
Rifles For Africa. Guns and Ammo. February,
Elmer Keith's Favorite Guns. Guns and Ammo. December, 1961
The African Battery. Guns and Ammo. May-June,
Rifles for Dangerous Game. Sports Afield. September, 1956
Keith's Choice of Game Loads. November,
1950. Source unknown
Enjoy these few articles from the greatest!