000			00398nam a2200157Ia 4500
008			130223s9999 xx 000 0 und d
080			_a551.4
245			_aGeographica Information system using ilwis
260			_aRoorkee
260			_bNational Institute of Hydrology
260			_c1993
300			_a59 p.
440			_aTR-159; National Institute of
901			_pS42430
942			_cB _2udc
999			_c123691 _d123691