Previously released as a compact disc.
The 2nd work originally for voice and piano, the 3rd and 12 works for piano, and the 4th work for orchestra.
Title from resource description page (viewed May 1, 2012).
Recorded Aug. 1971-Apr. 1978, in Abbey Road Studios and Kingsway Hall, London; and Jan. 1977, Heinz Hall, Pittsburgh (13th work).
Electronic reproduction. Alexandria, VA : Alexander Street Press, 2011. (Classical music library). Available via World Wide Web.