Prelude and Fugue No.15, Des-dur from the «Twenty-Four Preludes and Fugues (1950-1951), op. 87». Records of other items are missing. Execution date is unknown.
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.