Books, Brochures, and Chapters>Book Chapter:  Gibbon, Edward , The Decline and Fall of the Roman Empire Chapter 15, Retrieved on 2021-10-06

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Periodicals>Journal Article:  Cross, Gary , Play in America from Pilgrims and Patriots to Kid Jocks and Joystick Jockeys, Journal of Play, Vol 1, Issue 1, Retrieved on 2021-02-28

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Electronic/World Wide Web>Internet Article:  Nicoll, James Davis (2019-05-24), The Sad But Inevitable Trend Toward Forgotten SF, Retrieved on 2019-11-07

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Books, Brochures, and Chapters>Book:  Mortimer, Ian (2016), Millennium: From Religion to Revolution: How Civilization Has Changed Over a Thousand Years, Retrieved on 2018-02-10

Electronic/World Wide Web>Internet Article:  Ferguson, Niall (2017-08-15), The False Prophecy of Hyperconnection, Foreign Affairs, Retrieved on 2017-10-25

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Books, Brochures, and Chapters>Book:  Wells, H.G. (2006110), Little Wars and Floor Games: The Foundations of Wargaming, Retrieved on 2017-01-03

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Books, Brochures, and Chapters>Book:  Brand, Stewart (1984), Whole Earth Software Catalog, Retrieved on 2016-12-30

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Electronic/World Wide Web>Message Posted to Online Forum/Discussion Group:  sg_oneill, (June 27, 2016), Re:WTF is happening, Retrieved on 2016-07-08

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Electronic/World Wide Web>Internet Article:  bowiesongs, (2010), Oh! You Pretty Things, Retrieved on 2016-01-19

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Electronic/World Wide Web>Internet Article:  MILLIGAN, IAN (JUNE 17, 2013), In a Rush to Modernize, MySpace Destroyed More History, Active History, Retrieved on 2015-11-09

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