Co-operations with Harold Baumann, PhD, of the Technological University Zurich, who at the same time was chairman of the Association Montessori Switzerland (AMS), go back to the 1980s. At that time, co-operation referred to the German edition of Montessori’s work Psychoarithmetik, which was supervised by Dr. Baumann. He also took part in the international series of lectures in the winter semester of 1996/1997 at the University of Münster. For years, further co-operation has referred to editorial work for the specialist journal Montessori that is edited by Prof. Ludwig. This magazine is at the same time the official bulletin of the AMS.
Dr. Harold Baumann, Lindenweid 15, Grächwil, CH-3045 Maikirch, Schweiz; e-mail: firstname.lastname@example.org