000 00284nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
100 _aT P C
245 0 _aWASTE WATER TREATMENT PROCESS
250 _a2
260 _aDELHI
_bT P C TRAINING SYSTEM
_c1981
300 _a80
942 _2ddc
999 _c90137
_d90137