International Organization for Standardization (ISO)
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ISO 985:1976
ISO 985:1976 history
1976ISO 985:1976 Sodium hydroxide for industrial use — Determination of silica content — Gravimetric method by precipitation of quinoline molybdosilicate
1975ISO 985:1975 Sodium hydroxide for industrial use — Determination of silica content — Gravimetric method by precipitation of quinoline molybdosilicate