00316nam a2200109Ia 4500008004100000022001800041040002500059082002100084100002300105245005000128260002800178240215s9999    xx            000 0 und d  a0-471-14284-0  aNORSU-DumcNORSU-Dum  a910.285/D39/1997  aDemers, Michael N. 0aFundamentals of Geographic Information System  bJohn Wiley & Sonsc1997