Two-dimensional fourier transform applied to helicopter flyover noise

Coast Guard

United States. General Accounting Office

Forever

Maggie Stiefvater

Operation of aircraft

International Civil Aviation Organization. Council

The International Directory of Civil Aircraft

Gerard Frawley

Jane's World Aircraft Recognition Handbook

Derek Wood

Hover craft

Angela Croome

Helicopters

Mari C. Schuh

Helicopter Flight Dynamics

Gareth D. Padfield