The Rhine Valley : urban, harbour and industrial develpoment and environmental problems ; a regional guide dedicated to the 28th International Geographical Congress The Hague 1996 / Heinz Heineberg, Norbert de Lange, Alois Mayr (Eds.). Ed. by the Committee of the Federal Republic of Germany fpr the International Geographical Union in cooperation with the Institute of Regional Geography (Leipzig), the German Academy of Regional Geography (Trier) and the Committees of the Nederlands, France and Switzerland for the IGU