'Sydney Opera House', a paper dated March 1965, author unknown and an amended version of the same paper by the Trust, dated December 1965
"Sydney Opera House approaches", by Utzon, November 1962, to which is attached "Sketch for parking and Custom Office", dated May 1961. Map-Folio 7
'Sydney Opera House enlargement of orchestra pit in the minor hall', by the Assistant Government Architect, June 1967 Date: June 1967