|  | 
 
 
Preludes and fugues NN 2-4, 6, 7, 15, 18, 23. Recorded in Moscow, 1956, live 
 
Or. 87, Nos. 4,12,23,14,17,15, bis - No. 8. 
 
 
¹ 3, 6, 7, 2, 18 recorded in the Domovina Studio, Prague, December 3-4, 1956;   ¹ 4 recorded in the Dvorak Hall of the Rudolfinum, Prague, November 30, 1956. 
 
Preludes and Fugues ¹ 22, 21, 19, 20. |  |