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.lecture13.flv download	221.9 KB	2014-08-24 03:17:02+00:00
lecture13.flv download	465.1 MB	2014-08-24 03:17:02+00:00
lecture13.mov download	425.4 MB	2014-08-24 03:17:26+00:00
lecture13.mp3 download	46.9 MB	2014-08-24 03:17:46+00:00