Thats correct. But he is mentioned in liner notes on the backside.
Also LORD's does lists him for f the LP.
High on an open mike
[W8573-15] WNEW Saturday Night Swing Session
Fats Navarro (tp) Bill Harris (tb) Charlie Ventura, Allen Eager (ts) Ralph Burns (p) Al Valenti (g) Chubby Jackson (b) Buddy Rich (d)
WNEW broadcast, New York, April 12, 1947
WS5006 Sweet Georgia Brown (part 1) Vox 16102, VSP310, Giant Steps GSCR023 [CD]
WS5007 Sweet Georgia Brown (part 2) Vox 16103, VSP310, Giant Steps GSCR023 [CD]
WS5008 Sweet Georgia Brown (part 3) Vox 16104, VSP310, Giant Steps GSCR023 [CD]
WS5009 High on an open mike (part 1) Vox 16104, VSP310
WS5010 High on an open mike (part 2) 16103, -
WS5011 High on an open mike (part 3) 16102, -
Happy monster (unissued)