Photo 1: Charles JANSSENS during a session in Strasbourg, France, May 09, 1962.
Photo 2: Giorgio BRACCESI during a session in Strasbourg, France, May 09, 1962.
Photo 3: Mario PEDINI during a session in Strasbourg, France, May 09, 1962.
Photo 4: Paul J KAPTEYN during a session in Strasbourg, France, May 09, 1962.