00280nam a2200097Ia 4500008004100000082002000041100004300061245004300104260002500147300001000172260813b        |||||||| |||| 00| 0 eng d  a333.91bG786.WP  aGreat Britain and Ireland. H. M. S. O.  aWater pollution control engineeringb/  aLondon:bHMSO,c1970  a138p.