Author George Moffat   Published in 1974   Published by The Soaring Press, Los Altos, Ca, USA

Author Helena Smahelova (trans Marie Burg)   Published in 1966  Published by University of London Press

Author Martin Simons    Published in 2004    Published by EQIP For copyright reasons, only a sample of this book is available.

Authors Paul A Schweizer and Martin Simons    Published in 1998   Published by Airlife Publications For copyright reasons, only a sample of this book is…

Author John E Simpson    Published in 1994   Published by Cambridge University Press For copyright reasons, only a sample of this book is available.

Author Ann C Edmunds (Welch)   Published in 1939   Published by Country Life Ltd, London

Author Charles H Gibbs-Smith    Published in 1962    Published by HMSO, London For copyright reasons, only a sample of this book is available.

Author Bill Scull     Published in 1979    Published by Pelham Books, London

Author Terence Horsley     Published in 1944   Published by Eyre & Spottiswoode, London

Wolf Hirth  (trans Naomi Heron-Maxwell)   Published in 1938