00393nam a2200145Ia 4500008004100000020001500041082001600056100001900072245002600091260004400117300000800161650001800169650004200187653001800229170901s1976    xx            000 0 und d  a0471894656  a551.4bT93A  aTwidale, C. R. 0aAnalysis of Landforms  aSydneybJohn Wiley and Sons, Inc.c1976  a572  aPure Sciences  aScience of the earth and other worlds  aGeomorphology