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lecture12.flv download	140.6 MB	2012-08-22 21:57:04+00:00
lecture12.mov download	109.7 MB	2012-08-22 21:58:31+00:00
lecture12.mp3 download	20.5 MB	2012-08-22 22:00:33+00:00
lecture12.pdf download	216.4 KB	2012-08-22 22:00:52+00:00