Edition RZ 1002 (LP) Bertoncini - Brown - Cage Cifre - Four Systems - Cartridge Music

Side A:

1. Mario Bertoncini: Cifre (1964-67) 11:09
2. Earle Brown: Four Systems (1952-54) 4:22
3. Mario Bertoncini: Cifre (1964-67) 6:47

Side B:

1. John Cage: Cartridge Music (1960) 20:43

Mario Bertoncini, prepared piano (tracks A1, 2 and 3), small sounds (track B1). Mauro Cova and Alberto Neumann, prepared pianos (track A3)

Recorded in 1970. No further details mentioned.
LP released in 1989

Source: Original LP