Agustin Anievas /
Chopin /
Etude No. 4 in G-Flat Major, Op. 10, No. 5 'Black Keys'
April 5 - 7, 1966 in London - Abbey Road Studios - Studio No. 1
- ( 1 LP ) EMI 1C 037-00 638
- ( 1 LP ) EMI C 053-00 638
- ( 1 LP ) Electrola SME-81039
- ( 1 LP ) HMV HQS 1058
- ( 1 LP ) La Voix de Son Maitre CVA 922
- ( 1 LP ) Seraphim S-60081
- ( 1 LP ) World Record Club STZ 896
- ( 2 CD ) EMI 5 74290 2
June 11, 2009 in New York City - American Academy of Arts and Letters
- ( 1 CD ) Newport Classics NCD 60179