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http://www.straightdope.com/columns/read/908/what-is-don-mcleans-song-american-pie-all-about
"What is Don McLean's song "American Pie" all about?." The Straight Dope:. N.p., n.d. Web. 3 May 2014. <http://www.straightdope.com/columns/read/908/what-is-don-mcleans-song-american-pie-all-about>.
http://www.missamericanpie.co.uk/interpret.html
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http://understandingamericanpie.com/
"Introduction." Understanding American Pie. N.p., n.d. Web. 4 May 2014. <http://understandingamericanpie.com/>.
http://www.britannica.com/EBchecked/topic/266600/hippie
The Editors of Encyclopædia Britannica. "hippie (subculture)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 6 May 2014. <http://www.britannica.com/EBchecked/topic/266600/hippie>.