Author Derek Piggottt   Published in 1977     Published by Pelham Books, London For copyright reasons, only a sample of this book is available

Author Derek Piggottt   Published in 1990     Published by A&C Black, London For copyright reasons, only a sample of this book is available

Author Avon Curry     Published in 1961     Publisher WH Allen, London

January 1931 Edited by the British Gliding Association

Author Otto Lilienthtal (trans AW Isenthal)   Published in 1911  Published by Longmans, Green & Co, London

Compiled by George Camp   Published by Gordonair

Compiled by Gordon Camp     Published by Gordonair

Compiled by Gordon Camp    Published by the British Gliding Association

Compiled by Gordon Camp     Published by the Britush Gliding Association

3rd Edition Author Wally Kahn    Published 2011    Published by Walter Kahn