The New Encyclopædia Britannica, Volume 16
References
^ Jacob E. Safra (2012). The New Encyclopædia Britannica, Volume 16, Encyclopædia Britannica. ISBN 9780852299616 (revised May 2012)^ Encyclopaedia Britannica, inc (2012). 9780852299616, Encyclopædia Britannica, Inc. Wiki. ISBN 9780852299616 (revised Nov 2012)
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