found: Amram, D. Shir lʹerev Shabbat ... [Phonodisc] 1962.
found: New Grove dict. of opera(Shirley, George (Irving); b. Apr. 18, 1934, Indianapolis, IN; American tenor)
found: Information from 678 converted Dec. 18, 2014(tenor; b. 1934)
found: So you want to sing spirituals, 2019:pages xvii (George I. Shirley; Distringuished Emeritus Professor of Voice, University of Michigan)
found: University of Michigan WWW site, Jan. 13, 2020:(George I. Shirley; George Shirley; Joseph Edgar Maddy Distinguished University Emeritus Professor of Voice, he is a tenor)