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.lecture7.flv download	252.5 KB	2014-08-24 03:53:54+00:00
lecture7.flv download	508.9 MB	2014-08-24 03:53:55+00:00
lecture7.mp3 download	52.3 MB	2014-08-24 03:54:14+00:00
lecture7.mp4 download	503.0 MB	2014-08-24 03:54:17+00:00