| | The New encyclopaedia Britannica(15th Edition) by Robert Mchenry, Robert P. Gwinn, Mortimer J. Adler, Frank B. Gibney, Brian Anderson, John Douglas Ritchie, Robert Eugene Bogner, Warren Bebbington, Geoffrey Blainey, Frank Graham Little, David Fraser, Leonie Judith Kramer, Charles Oxnard, Hans Daalder, Marc Auge, Mauro Cappelletti, Fernando Gil, Pedro Schwartz, Otfried Madelung, Manfred Eigen, Gunther Wilke, Brian Pippard, Geoffrey Elton, Kurt Lipstein, John Lyons, Ian Stewart, Maurice Cranston, Donald Gunn Macrae, Donald Nicol, Uwe Kitzinger, C. Anthony Storr, Keith Thomas, Nigel Calder, Peter Wyllie, Rene Dubos, Mark Van Doren, Harold Lasswell, Lord Ritchie-Calder, Isaac Asimov, Carl Sagan, Inc. Encyclopedia Britannica, Encyclopaedia Britannica Inc, Encyclopaedia Britannica, No Acknowledged, Inc. Encyclopdia Britannica, Peter B. Norton, Joseph J. Esposito Hardcover, 32,030 Pages, Published 1993 by Encyclopaedia Britannica (Uk) Ltd ISBN-13: 978-0-85229-571-7, ISBN: 0-85229-571-5
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