000 00284nam a2200121Ia 4500
008 211209s1974 xx 000 0 und d
041 _aeng
082 _a628 N74 GUR
100 _aGURCHARAN SINGH
245 _aWATER SUPPLY AND SANITORY ENGINEERING
260 _c1974
300 _a543
999 _c13358
_d13358