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Class of October 28 Video

width: 480 960 1920 ogg/20-1350-201028_480.ogg orig/20-1350-201028.mp4
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Managed by dbnvp: Tip: blackboard shots are taken when the discussion of their content has just ended. To see the beginning of the discussion on a certain blackboard, roll the video to the time of the preceeding blackboard.