000 00293nam a2200121Ia 4500
008 190719s9999 xx 000 0 und d
082 _a628.3 B694
100 _aBOLTON,R.L
245 0 _aSEWAGE TREATMENT
260 _aLONDON
_bButterworth-Heinemann
_c1961
300 _a22X14
942 _cBK
_2DDC
999 _c47290
_d47290