Martha Argerich collection - Argerich, Martha 1941-; Sinopoli, Giuseppe 1946-2001; Rostropovič, Mstislav 1927-2007; Dutoit, Charles 1936-; Abbado, Claudio 1933-2014; Economou, Nicolas 1953-1993; Freire, Nelson 1944-2021; Sadlo, Peter 1962-2016; Guggeis, Edgar