00295nam a2200109Ia 4500008004100000041000800041082001400049100003400063245006200097260001900159365000700178230303s9999    xx            000 0 und d  aeng  a004.21 LO  aLO (C.P.) YEUNG (ALBERT K.W.)  aConcepts and Techniques of Geographic Information Systems  aNew DelhibPHI  cRS