000			00267nam a2200097 4500
999			_c337368 _d337368
082			_a910.285 _bHEY.I
100			_aHeywood,Ian,et al.
245			_aAn Introdoctionto Geographical Information Systems _cHeywood,Ian,et al.
260			_aLondon _c1988 _bLongman
942			_cBK