00421nam a2200121Ia 450000500170000000800410001702000180005805000160007610000200009224500900011226000410020265000560024320251229085654.0251229s9999    xx            000 0 und d  a9780470021675  aG 70.2 .S44  aAgarwal, Pragya 0aSelf-organising mapsb applications in geographic information sciencecPragya Agarwal  aChichesterb John Wiley & Sonsc2008  aGeographic Information Systems -Mathematical Models