Title from both discs combined.
Compact discs.
Originally issued on Decca & London stereo analog discs.
Program notes, chiefly about the performers, by Tully Potter inserted in on container.
Recorded in the Sofiensaal, Vienna, Apr. 1961 (K 136, K 334), Sept. 1962 (K 287), Oct. 1963 (K 247) & Oct. 1964 (K 205, K 290).