00315nam a2200109Ia 4500008004100000022001800041040002500059082002100084100002100105245005500126260002400181240215s9999    xx            000 0 und d  a0-13-294786-2  aNORSU-DumcNORSU-Dum  a910.285/C55/1997  aClarke, Keith C. 0aGetting Started with Geographic Information System  bPrentice Hallc1997