00274nam a2200121 a 450000500170000008200210001710000060003811000210004424500290006525000110009426000320010530000150013720251203091038.0  a628.162,bD, kem  d_  aKemmer, Frank N.  aThe NALCO water handbook  a2nd ed  aNew YorkbMcGraw-Hillc1987  a700p, 22cm