Bridgman, L, (ed.) (1998) Crescent. ISBN 0-517-67964-7 Gunston, Bill. . Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9 Lumsden, Alec. . Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6. Warner, G. . London: Crécy Publishing, 2nd edition 2005. ISBN 0-85979-101-7.