Previously released as a compact disc; Previously issued 1967 (1st work) and 1962 (2nd and 3rd works).
Title from resource description page (viewed May 1, 2012).
Recorded in Kingsway Hall, London, Feb. 1967 (1st work), Oct. 1961 (2nd work) and Nov. 1961 (3rd work).
Electronic reproduction. Alexandria, VA : Alexander Street Press, 2011. (Classical music library). Available via World Wide Web.