found: Basie, C. Count Basie at the Portland Auditorium [SR] 1953-1954:insert (Billy Eckstine)
found: LC data base, 6-3-91(hdg.: Eckstine, Billy)
found: New Grove dict. of jazz, 1994(Eckstine, Billy (Eckstein, William Clarence; Mr. B); b. July 8, 1914, Pittsburgh, d. Mar. 8, 1993, Pittsburgh; singer and bandleader)
found: Washington Post, 03-09-93(b. William Clarence Eckstein, Pittsburgh; d. 03-08-93)
found: Basie, C. Basie/Eckstine Inc. [SR] p1994:label (Billie Eckstine)
found: NUCMC data from Virginia Union University for Henderson, S.L. Photographs, 1912-1989(Billy Ekstein)
found: BGMI, Aug. 22, 2003(Billy Eckstein)
found: Biog. resources, Aug. 22, 2003(Billy Eckstine; Also known as: William Clarence Eckstein, William Clarence Eckstine; Birth: July 8, 1914 in Pittsburgh, Penn.; Death: March 8, 1993 in Pittsburgh, Penn.)
found: African American National Biography, accessed January 16, 2015, via Oxford African American Studies Center database:(Eckstine, Billy; William Clarence Eckstein; Mr. B.; bandleader, jazz musician, jazz singer; born 08 July 1914 in Pittsburgh, Pennsylvania, United States; B.A. from Shaw University (Raleigh, N.C.) (1947); was Earl Hines's principal vocalist (1939-1943); became with the with national hit, Jelly, Jelly, popularizing the new Earl Hines Orchestra (1940); continued success with song Skylark (1942); established own band, known as the first true bebop big band (1944); went solo as one of the first artists to sign with the newly established MGM Records (1947); was widely considered the country's most popular vocalist (1949-1950); died 08 March 1993 in Pittsburgh, Pennsylvania, United States)