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ISBN unknown* Sir Banister Fletcher, "A History of Architecture on the Comparative Method", first published 1896, current edition 2001, Elsevier Science & Technology ISBN 0-7506-2267-9* Helen Gardner, "Art through the Ages", 5th edition, Harcourt, Brace and World, ISBN 07679933* John Harvey, "English Cathedrals", 1963, Batsford, ISBN* Lawrence Lee, George Seddon, Francis Stephens, "Stained Glass", Spring Books, ISBN 0-600-56281-6* Elizabeth Morris, "Stained and Decorative Glass", Doubleday, ISBN 0-86824-324-8* Anne Mueller von der Haegen, Ruth Strasser, "Art and Architecture of Tuscany", 2000, Konemann, ISBN 3-8290-2652-8* Nikolaus Pevsner, "An Outline of European Architecture", Pelican, 1964, ISBN unknown* Joseph Rykwert, "Leonis Baptiste Alberti, Architectural Design", Vol 49 No 5–6, Holland St, London* Otto von Simson (1956), "The Gothic cathedral, Origins of Gothic architecture and the Medieval Concept of Order", 3rd ed.