00407nam a2200145Ia 4500008004100000020001500041041001200056082001600068100001500084245008500099260004000184300000800224650001200232700001700244221030s9999    xx            000 0 und d  a8178089823  aEnglish  a105.23bHey  aI. Heywood 3aAn Introduction to Geographical Information systemscby I. Heywood, S. Cornelius  bPearson  EducationaNew Delhic2003  a295  aGeneral  aS. Cornelius