· The ball valve for ... Health Association (Joint APHA, AWWA and WEF publication). Washington...
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· The ball valve for ... Health Association (Joint APHA, AWWA and WEF publication). Washington D.C. Water Analysis Handbook, 2nd Edition. 1992. HACH Company Loveland, CO. 831 pages
![Physico-Chemical Assessment of Surface Water …...APHA, 1989 [8] and BIS: 3025, 1987 (Reaffirmed 2003) [9]. The turbidity of the samples were analyzed with HACH-2100Q and reported](https://img.pdfslide.us/doc/110x75/5e67d296ade60e01762a15db/physico-chemical-assessment-of-surface-water-apha-1989-8-and-bis-3025-1987.jpg)
