00255nam a2200109Ia 4500008004100000041001200041082001100053100002400064245004500088260000600133650000600139221030s9999    xx            000 0 und d  aEnglish  a105.23  aM. E. V. Valkenburg 0aNetwork Analysiscby M. E. V. Valkenburg  c0  aB