00572nam a2200181 a 450000500170000002000150001708200210003210000220005324500600007526000420013530000200017769000520019770000210024996400190027099700180028999900170030795200660032420251203091831.0  a0850668573  a910.285,bD, int  aPeuquet, Donna J.  aIntroductory readings in Geographic information systems  aLoNew DelhionbTayloy & Francisc1990  ax,371p.c24 cm.  aGeography, Application of microcomputer systems  aMarble, Duane F.  bengcdefg_  a84413 LIBSS C  c54360d54360  00104070aPUbPUd1998-04-08l0o910.285, D, intp84413yBK