000 00329nam a2200121Ia 4500
008 220201s1990 xx 000 0 eng d
041 _aENG
100 _aIS:11401(PART-2)1990
245 0 _aGENERAL REQUIREMENTS FOR SLOW SAND FILTERS
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1990
300 _a5
942 _2ddc
999 _c62070
_d62070