000			00299nam a2200109Ia 4500
008			200302s9999 xx 000 0 und d
100			_aWilliam P. Cunningham and Others
245			_aEnvironmental Science A Global Concern 12th ed.
260			_bMc Graw-Hill Co. Ltd.
260			_c2012
300			_a613
999			_c7231 _d7231