*"The Lost Centuries: From the Muslim Empires to the Renaissance of Europe, 1145-1453", Hodder & Stoughton, 1966, Prentice-Hall, 1967.
*"The Lost Centuries: From the Muslim Empires to the Renaissance of Europe, 1145-1453", Hodder & Stoughton, 1966, Prentice-Hall, 1967.