Frank Gassman,

Howard Griffiths, Strings of Zürich, Bruno Peier, Catherine Montavon, Frank Gassman,, Semra Griffiths

Strings of Zürich, Howard Griffiths, Rainer Guenther, Frank Gassman,, Catherine Montavon, Semra Griffiths

Howard Griffiths, Strings of Zürich, Bruno Peier, Catherine Montavon, Frank Gassman,, Semra Griffiths