Knittel, K. M. (Kay M.)Lewis, William L., 1935-2011-08-092017-05-112011-08-092017-05-112005-08http://hdl.handle.net/2152/12961textelectronicengCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.SingingOperaWagner, Richard, 1813-1883. OperasTenors (Singers)