Keller, Fred S.2020-07-102020-07-101979-05http://hdl.handle.net/10919/99329Dimensions: 654 x 480Duration: 00:57:51Size: 1.51 GBvideo/mp4video/webmimage/jpegtext.mp4-en.vttenIn CopyrightFred Keller at 80: A Great Teacher RepentsPresentation