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1 | Substitutes for tripolyphosphate in detergents / Economic Commission for Europe . — New York : United Nations, 1992. — 78 p. ; 30 cm. — ( ECE/CHEM/80) | ![]() |
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1 | Substitutes for tripolyphosphate in detergents / Economic Commission for Europe . — New York : United Nations, 1992. — 78 p. ; 30 cm. — ( ECE/CHEM/80) | ![]() |