Sodium chloride
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http://site.ebrary.com/lib/rucke/Doc?id=10568068
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"ANSI/AWWA B200-12 (revision of ANSI/AWWA B200-07)."
At head of title: AWWA standard.
"Effective date: June 1, 2012. First edition approved by AWWA Board of Directors July 6, 1949. This edition approved Jan. 22, 2012. Approved by American National Standards Institute March 27, 2012."
Electronic reproduction. Palo Alto, Calif. : ebrary, 2011. Available via World Wide Web. Access may be limited to ebrary affiliated libraries.
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