Porter, Dot2023-05-232014-08-282014-08-012014-08-28https://repository.upenn.edu/handle/20.500.14332/46880http://hdl.library.upenn.edu/1017/d/medren/5028998youtubeHistoryMedieval StudiesOther Arts and HumanitiesPenn Library's LJS 188 - Ynstruction of the ephimeredes (Video Orientation)Media