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.lecture13.flv download	205.7 KB	2014-08-24 03:26:59+00:00
lecture13.flv download	406.5 MB	2014-08-24 03:27:00+00:00
lecture13.mov download	370.0 MB	2014-08-24 03:27:15+00:00
lecture13.mp3 download	41.0 MB	2014-08-24 03:27:30+00:00