An Illustrated A-Z Directory of Military Helicopters: Featuring over 80 helicopters shown in more than 300 historical and modern photographs

The World Encyclopedia of Military Helicopters: Featuring over 80 helicopters with 500 historical and modern photographs

Helicopters: Military (Aviation Factfile (Chartwell Books))

The World Encyclopedia of Fighters & Bombers: An Illustrated History of The World's Greatest Military Aircraft, From the Pioneering Days of Air ... and Stealth Bombers of the Present Day

The Illustrated Encyclopedia of Helicopters

Helicopters (Pull Ahead Books)

Modern Military Aircraft (The Aviation Factfile)

Choppers! (Step into Reading)

Tank: The Definitive Visual History of Armored Vehicles

Principles of Helicopter Flight

Helicopter Gunships: Deadly Combat Weapon Systems (Specialty Press)