What Australian dramatic coloratura soprano collaborated with Richard Conrad?
Richard Conrad: Richard Conrad (born 1935) is an American singer whose voice has at times inhabited both the tenor and baritone ranges. Joan Sutherland: Dame Joan Alston Sutherland, OM, AC, DBE (7 November 192610 October 2010) was an Australian dramatic coloratura soprano noted for her contribution to the renaissance of the bel canto repertoire from the late 1950s through to the 1980s.
i don't know