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BS 2690 : Pt. 13 : 1972 : Methods of testing water used in industry : dichromate value, non-volatile organic carbon tannis and chlorine - London B.S.I. 1972 - 19p.

STD691

BS 2690 : Pt. 13 : 1972

628.1 / : 663.63.01 : 543.3

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