Columbia MS 7051 (LP) New Electronic Music

John Cage: Variations II (1961) version for amplified piano
Milton Babbitt: Ensembles for syntheszier
Henri Pousseur: Trois visages de Liège

David Tudor, amplified piano (in Variations II)

Re-released on LP: CBS Music of Our Time S-34-61064
Currently available on CD: Sony SICC 78.
This recording of Variations II currently also available on Edition RZ 1018-19
Recording details unknown
LP released in 1967

Sources: New Albion Discography and University of Washington Library Catalog