. . "Joe Bostic presents First Annual Negro Gospel Music Festival\r\nFeaturing Mahalia Jackson, Premiere Gospel Songstress\r\nNote that program also featured the \"entire cast of \"Negro Sings\" program, radio station WLIB. (This broadcast is heard each Sunday morning, 7-10 o'clock, with Joe Bostic as announcer and producer)\"." . . . . . . . . . . . "Negro Gospel Music Festival featuring Mahalia Jackson" . . . "multiple performances" . . . . . . . . . . . . "1950-10-01T14:00:00"^^ . . . . . . .