Previously released material.
Program notes in English in container.
Recorded in No. 1 Studio, Abbey Road, London, 30 & 31 July and 1 & 2 Aug, 1967 (1st work) ; Kingsway Hall, London, 19 & 20 July and 24 Dec. 1971 (2nd work) ; Bedworth Civic Center, 1 & 2 Sept. 1976.