The Helicopter : an illustrated history / Keith Carey Helicopters / by Kate Petty ; consultant Angela Grunsell ; illustrated by Douglas Harker The Helicopter / Hollingsworth Franklin Gregory The Helicopter : history, piloting and how it flies / John Fay ; illustrated by Lucy Raymond, David Gibbings, Dulcie Legg Inside a helicopter / Tom Jackson The world encyclopedia of military helicopters / Francis Crosby ; editor, Felicity ForsterBasic helicopter aerodynamics / John Seddon, Simon NewmanPenerbangan angkasa luar / Ole SteenHansen, alihbahasa ; Dewinta V. Maharani, editor ; A. MellyoraTransportasi laut & udara [rekaman video] : Helicopters, the space shuttle, boat and ships / producer, Belinda Grode ; director, Lucius G. Tatum; writer, Linda ShayneRoti sehat Titi / Tedi Siswoko ; Ilustrasi, David Tanama