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The Art of Ralph McQuarrie
tor.com - Ralph McQuarrie, 1929–2012
Slashdot - Star Wars Conceptual Artist Ralph McQuarrie Dies at 82

The original unaltered trilogy refers to the original theatrical versions of the first three Star Wars films, before they were modified for the special edition and subsequent re-releases. These sets have been repackaged for a November 2008 box set release.