FRANCE. Ile-de-France region. Yvelines department. Chevreuse, at Joachim Kühn's house. From left to right : French jazz musician Jean-François JENNY-CLARK (double bass), Argentinian jazz musician Gato BARBIERI (saxophone) and German jazz musician Joachim KUHN (piano). Rehearsal for the concert on Thursday, April 18th at the "10e Festival International de Jazz d'Amiens". Monday, April 15th 1991.