August 24, 2009 12:00 PM

>Two expansive new box sets—The Woodstock Experience and Woodstock 40 Years On: Back to Yasgur’s Farm—commemorate the 40th anniversary of the legendary festival, which began on Aug. 15, 1969 with a lineup including Janis Joplin, Sly & the Family Stone and Jimi Hendrix (right).

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