[78-L] Bernstein's Rhapsody

[Malcolm Rockwell]

Somewhat off topic as this is a 33rpm performance, but who was the 
pianist on Lennie Bernstein's 1960 rendition of the "Rhapsody In Blue" 
on Columbia (rec. Brooklyn, NY on 06/23/59)? "An American In Paris" is 
on the other side. Was it actually LB himself? And if so how does one 
conduct a full orchestra while simultaneously playing the piano parts? 
The piece is complicated enough, already.
Although many consider this to be the ne plus ultra of the Rhapsody,  I 
still prefer Levant's 78rpm interpretation.
Mal