Historical period data source information
Wolfram|Alpha Knowledgebase, 2021.
Background sources and references:
- Grun, B. and E. Simpson. The Timetables of History: A Horizontal Linkage of People and Events. (4th ed.) Touchstone, 2005.
Pearson Education. "World History." Infoplease. »
- Scarre, C. Smithsonian Timelines of the Ancient World. Smithsonian Institution, 1993.
- Teeple, J. B. Timelines of World History. DK Publishing, 2006.
The Wikimedia Foundation, Inc. Wikipedia. »
- Wiltshire, K. The British Museum Timeline of the Ancient World. (1st ed.) Palgrave Macmillan, 2004.
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