Author CH Latimer Needham    Published in 1937    Published by Chapman & Hall, London

Author George T Collins   Published in 1988.   Published by G T Collins

Author Martin Simons           Published in 1996    Publoished by Airlife Publishing

Author I Shattock.   Published in 1985.

Author James E Mrazek   Published in 1973   Published by Stackpole Books, Harrisburg, Pa, USA

Author Martin Simons    Published in 2001    Published by EQIP For copyright reasons, only a sample of this book is available.

Author Martin Simons    Published in 2002    Published by EQIP For copyright reasons, only a sample of this book is available.

Author Paul H Blanchard             Published in 1955          Published by Thermal Equipment Ltd, London

Author F Warren Merriam    Published in 1954     Published by BT Batsford, Ltd, London

The art of gliding and soaring. Author Lewin B Barringer.  Published in 1940.  Published by Pitman Publishing Corporatin, New York.