00455nam a2200157Ia 4500008004100000082002100041100001800062245005300080260003200133300000800165650001800173650004200191653003500233653001400268653001500282170901s2003    xx            000 0 und d  a551.480285bL98G  aLyon, John G. 0aGIS for Water Resources and Watershed Management  aBoca RatonbCRC Pressc2003  a266  aPure Sciences  aScience of the earth and other worlds  aGeographic information systems  aHydrology  aWatersheds